path: root/librewolf-pref-pane.patch

From cd0ec42d56fe5d4689ed19c84ad5ca5a27a005fd Mon Sep 17 00:00:00 2001
From: ohfp <1813007-ohfp@users.noreply.gitlab.com>
Date: Tue, 12 Apr 2022 11:57:53 +0200
Subject: [PATCH] port pref-pane patch changes to gecko-dev

fix xorigin pref init and handling

[LW] Ask to Restart Browser if Sync Pref in LW Settings is changed
---
 browser/components/preferences/jar.mn         |   1 +
 .../preferences/librewolf.inc.xhtml           | 254 ++++++++++++++++
 browser/components/preferences/librewolf.js   | 287 ++++++++++++++++++
 browser/components/preferences/preferences.js |   2 +
 .../components/preferences/preferences.xhtml  |  13 +
 .../en-US/browser/preferences/preferences.ftl |  95 ++++++
 browser/themes/shared/jar.inc.mn              |   2 +
 .../shared/preferences/category-librewolf.svg |  96 ++++++
 .../themes/shared/preferences/librewolf.css   |  23 ++
 .../themes/shared/preferences/preferences.css |   4 +
 10 files changed, 777 insertions(+)
 create mode 100644 browser/components/preferences/librewolf.inc.xhtml
 create mode 100644 browser/components/preferences/librewolf.js
 create mode 100644 browser/themes/shared/preferences/category-librewolf.svg
 create mode 100644 browser/themes/shared/preferences/librewolf.css

diff --git a/browser/components/preferences/jar.mn b/browser/components/preferences/jar.mn
index 912d9edf0855..30a83da4edca 100644
--- a/browser/components/preferences/jar.mn
+++ b/browser/components/preferences/jar.mn
@@ -11,6 +11,7 @@ browser.jar:
    content/browser/preferences/home.js
    content/browser/preferences/search.js
    content/browser/preferences/privacy.js
+   content/browser/preferences/librewolf.js
    content/browser/preferences/containers.js
    content/browser/preferences/sync.js
    content/browser/preferences/experimental.js
diff --git a/browser/components/preferences/librewolf.inc.xhtml b/browser/components/preferences/librewolf.inc.xhtml
new file mode 100644
index 000000000000..c2dfea6d0858
--- /dev/null
+++ b/browser/components/preferences/librewolf.inc.xhtml
@@ -0,0 +1,254 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+<script src="chrome://browser/content/preferences/librewolf.js"/>
+
+<html:template id="template-paneLibrewolf">
+
+<hbox class="subcategory" hidden="true" data-category="paneLibrewolf">
+  <html:h1 data-l10n-id="librewolf-header"/>
+</hbox>
+
+<groupbox hidden="true" data-category="paneLibrewolf">
+  <html:h2 data-l10n-id="librewolf-general-heading"/>
+
+  <!-- TEMPLATE FOR A NEW PREFERENCE
+  <hbox>
+    <checkbox id="librewolf-LABEL-checkbox" data-l10n-id="librewolf-LABEL-checkbox" preference="PREF" flex="1" />
+    <html:label for="librewolf-LABEL-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-LABEL-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-LABEL-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-LABEL-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="PREF" label="PREF" />
+    </vbox>
+  </vbox>
+  -->
+
+  <hbox>
+    <checkbox id="librewolf-extension-update-checkbox" data-l10n-id="librewolf-extension-update-checkbox" preference="extensions.update.autoUpdateDefault" flex="1" />
+    <html:label for="librewolf-extension-update-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-extension-update-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-extension-update-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-extension-update-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="extensions.update.autoUpdateDefault" label="extensions.update.autoUpdateDefault" />
+      <checkbox preference="extensions.update.enabled" label="extensions.update.enabled" />
+    </vbox>
+  </vbox>
+
+  <hbox>
+    <checkbox id="librewolf-sync-checkbox" data-l10n-id="librewolf-sync-checkbox" preference="identity.fxaccounts.enabled" flex="1" />
+    <html:label for="librewolf-sync-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-sync-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-sync-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-sync-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="identity.fxaccounts.enabled" label="identity.fxaccounts.enabled" />
+    </vbox>
+  </vbox>
+  
+  <hbox>
+    <checkbox id="librewolf-autocopy-checkbox" data-l10n-id="librewolf-autocopy-checkbox" preference="clipboard.autocopy" flex="1" />
+    <html:label for="librewolf-autocopy-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-autocopy-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-autocopy-description" />
+      <checkbox preference="clipboard.autocopy" label="clipboard.autocopy" />
+      <checkbox preference="middlemouse.paste" label="middlemouse.paste" />
+    </vbox>
+  </vbox>
+
+  <hbox>
+    <checkbox id="librewolf-styling-checkbox" data-l10n-id="librewolf-styling-checkbox" preference="toolkit.legacyUserProfileCustomizations.stylesheets" flex="1" />
+    <html:label for="librewolf-styling-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-styling-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-styling-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-styling-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="toolkit.legacyUserProfileCustomizations.stylesheets" label="toolkit.legacyUserProfileCustomizations.stylesheets" />
+    </vbox>
+  </vbox>
+
+</groupbox>
+
+<groupbox hidden="true" data-category="paneLibrewolf">
+  <html:h2 data-l10n-id="librewolf-network-heading" />
+
+  <hbox>
+    <checkbox id="librewolf-ipv6-checkbox" data-l10n-id="librewolf-ipv6-checkbox" preference="network.dns.disableIPv6" flex="1" />
+    <html:label for="librewolf-ipv6-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-ipv6-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-ipv6-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-ipv6-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="network.dns.disableIPv6" label="network.dns.disableIPv6" />
+    </vbox>
+  </vbox>
+
+</groupbox>
+
+<groupbox hidden="true" data-category="paneLibrewolf">
+  <html:h2 data-l10n-id="librewolf-privacy-heading" />
+
+  <hbox>
+    <checkbox id="librewolf-xorigin-ref-checkbox" data-l10n-id="librewolf-xorigin-ref-checkbox" preference="network.http.referer.XOriginPolicy" flex="1" />
+    <html:label for="librewolf-xorigin-ref-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-xorigin-ref-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-xorigin-ref-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-xorigin-ref-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox disabled="true" preference="network.http.referer.XOriginPolicy" label="network.http.referer.XOriginPolicy" />
+    </vbox>
+  </vbox>
+
+</groupbox>
+
+<groupbox hidden="true" data-category="paneLibrewolf">
+  <html:h2 data-l10n-id="librewolf-broken-heading" />
+
+  <hbox>
+    <checkbox id="librewolf-rfp-checkbox" data-l10n-id="librewolf-rfp-checkbox" preference="privacy.resistFingerprinting" flex="1" />
+    <html:label for="librewolf-rfp-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-rfp-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-rfp-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-rfp-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="privacy.resistFingerprinting" label="privacy.resistFingerprinting" />
+    </vbox>
+  </vbox>
+
+  <vbox class="indent">
+
+    <hbox>
+      <checkbox id="librewolf-letterboxing-checkbox" data-l10n-id="librewolf-letterboxing-checkbox" preference="privacy.resistFingerprinting.letterboxing" flex="1" />
+      <html:label for="librewolf-letterboxing-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+    </hbox>
+    <vbox class="librewolf-collapse indent">
+      <html:input type="checkbox" id="librewolf-letterboxing-collapse" />
+      <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+        <label data-l10n-id="librewolf-letterboxing-description" />
+        <checkbox preference="privacy.resistFingerprinting.letterboxing" label="privacy.resistFingerprinting.letterboxing" />
+      </vbox>
+    </vbox>
+
+    <hbox>
+      <checkbox id="librewolf-auto-decline-canvas-checkbox" data-l10n-id="librewolf-auto-decline-canvas-checkbox" preference="privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts" flex="1" />
+      <html:label for="librewolf-auto-decline-canvas-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+    </hbox>
+    <vbox class="librewolf-collapse indent">
+      <html:input type="checkbox" id="librewolf-auto-decline-canvas-collapse" />
+      <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+        <label data-l10n-id="librewolf-auto-decline-canvas-description" />
+        <html:div> <label data-l10n-id="librewolf-auto-decline-canvas-warning1" class="librewolf-warning" /> </html:div>
+        <checkbox preference="privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts" label="privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts" />
+      </vbox>
+    </vbox>
+
+  </vbox>
+
+  <hbox>
+    <checkbox id="librewolf-webgl-checkbox" data-l10n-id="librewolf-webgl-checkbox" preference="webgl.disabled" flex="1" />
+    <html:label for="librewolf-webgl-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-webgl-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-webgl-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-webgl-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="webgl.disabled" label="webgl.disabled" />
+    </vbox>
+  </vbox>
+
+
+</groupbox>
+
+<groupbox hidden="true" data-category="paneLibrewolf">
+  <html:h2 data-l10n-id="librewolf-security-heading" />
+
+  <hbox>
+    <checkbox id="librewolf-ocsp-checkbox" data-l10n-id="librewolf-ocsp-checkbox" preference="security.OCSP.require" flex="1" />
+    <html:label for="librewolf-ocsp-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-ocsp-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-ocsp-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-ocsp-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="security.OCSP.require" label="security.OCSP.require" />
+    </vbox>
+  </vbox>
+
+  <hbox>
+    <checkbox id="librewolf-goog-safe-checkbox" data-l10n-id="librewolf-goog-safe-checkbox" preference="browser.safebrowsing.malware.enabled" flex="1" />
+    <html:label for="librewolf-goog-safe-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+  </hbox>
+  <vbox class="librewolf-collapse indent">
+    <html:input type="checkbox" id="librewolf-goog-safe-collapse" />
+    <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+      <label data-l10n-id="librewolf-goog-safe-description" />
+      <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-goog-safe-warning1" class="librewolf-warning" /> </html:div>
+      <checkbox preference="browser.safebrowsing.malware.enabled" label="browser.safebrowsing.malware.enabled" />
+      <checkbox preference="browser.safebrowsing.phishing.enabled" label="browser.safebrowsing.phishing.enabled" />
+      <checkbox preference="browser.safebrowsing.blockedURIs.enabled" label="browser.safebrowsing.blockedURIs.enabled" />
+      <checkbox preference="browser.safebrowsing.provider.google4.gethashURL" label="browser.safebrowsing.provider.google4.gethashURL" id="librewolf-goog-safe-hash4"/>
+      <checkbox preference="browser.safebrowsing.provider.google4.updateURL" label="browser.safebrowsing.provider.google4.updateURL" id="librewolf-goog-safe-up4"/>
+      <checkbox preference="browser.safebrowsing.provider.google.gethashURL" label="browser.safebrowsing.provider.google.gethashURL" id="librewolf-goog-safe-hash"/>
+      <checkbox preference="browser.safebrowsing.provider.google.updateURL" label="browser.safebrowsing.provider.google.updateURL" id="librewolf-goog-safe-up"/>
+    </vbox>
+  </vbox>
+
+  <vbox class="indent">
+    <hbox>
+      <checkbox id="librewolf-goog-safe-download-checkbox" data-l10n-id="librewolf-goog-safe-download-checkbox" preference="browser.safebrowsing.downloads.enabled" flex="1" />
+      <html:label for="librewolf-goog-safe-download-collapse" class="sidebar-footer-link" pack="end"> <image class="sidebar-footer-icon help-icon"/> </html:label>
+    </hbox>
+    <vbox class="librewolf-collapse indent">
+      <html:input type="checkbox" id="librewolf-goog-safe-download-collapse" />
+      <vbox class="librewolf-collapsed tracking-protection-ui content-blocking-category">
+        <label data-l10n-id="librewolf-goog-safe-download-description" />
+        <html:div> <image src="chrome://browser/skin/warning.svg" /> <label data-l10n-id="librewolf-goog-safe-download-warning1" class="librewolf-warning" /> </html:div>
+        <checkbox preference="browser.safebrowsing.downloads.enabled" label="browser.safebrowsing.downloads.enabled" />
+      </vbox>
+    </vbox>
+  </vbox>
+
+</groupbox>
+
+<hbox class="subcategory" hidden="true" data-category="paneLibrewolf">
+    <html:h1 data-l10n-id="librewolf-footer"/>
+</hbox>
+
+<groupbox data-category="paneLibrewolf" hidden="true">
+  <vbox align="start">
+    <hbox>
+      <button id="librewolf-config-link" is="highlightable-button" flex="1">
+        <image class="librewolf-button-icon" src="chrome://browser/skin/ion.svg" /> <!-- TODO not the typical way a picture is defined I think, and also we should copy the svg file in case they change it -->
+        <label data-l10n-id="librewolf-config-link"></label>
+      </button>
+      <button id="librewolf-open-profile" is="highlightable-button" flex="1">
+        <image class="librewolf-button-icon" src="chrome://browser/skin/open.svg" />
+        <label data-l10n-id="librewolf-open-profile"></label>
+      </button>
+    </hbox>
+  </vbox>
+</groupbox>
+
+</html:template>
diff --git a/browser/components/preferences/librewolf.js b/browser/components/preferences/librewolf.js
new file mode 100644
index 000000000000..c8cbb075d59b
--- /dev/null
+++ b/browser/components/preferences/librewolf.js
@@ -0,0 +1,287 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* import-globals-from extensionControlled.js */
+/* import-globals-from preferences.js */
+
+var { AppConstants } = ChromeUtils.import( "resource://gre/modules/AppConstants.jsm");
+XPCOMUtils.defineLazyGetter(this, "L10n", () => {
+  return new Localization([
+    "branding/brand.ftl",
+    "browser/preferences/preferences.ftl",
+  ]);
+});
+
+Preferences.addAll([
+  // IPv6
+  { id: "network.dns.disableIPv6", type: "bool" },
+  // ocsp hard-fail
+  { id: "security.OCSP.require", type: "bool" },
+  // ocsp hard-fail
+  { id: "identity.fxaccounts.enabled", type: "bool" },
+  // WebGL
+  { id: "webgl.disabled", type: "bool" },
+  // RFP
+  { id: "privacy.resistFingerprinting", type: "bool" },
+  // Automatically Update Extensions
+  { id: "extensions.update.enabled", type: "bool" },
+  { id: "extensions.update.autoUpdateDefault", type: "bool" },
+  // Clipboard autocopy/paste
+  { id: "clipboard.autocopy", type: "bool" },
+  { id: "middlemouse.paste", type: "bool" },
+  // XOrigin referrers
+  { id: "network.http.referer.XOriginPolicy", type: "int" },
+  // Harden
+  { id: "privacy.resistFingerprinting.letterboxing", type: "bool" },
+  // Google Safe Browsing
+  //{ id: "browser.safebrowsing.malware.enabled", type: "bool" }, // Already loaded
+  //{ id: "browser.safebrowsing.phishing.enabled", type: "bool" },
+  { id: "browser.safebrowsing.blockedURIs.enabled", type: "bool" },
+  { id: "browser.safebrowsing.provider.google4.gethashURL", type: "string" },
+  { id: "browser.safebrowsing.provider.google4.updateURL", type: "string" },
+  { id: "browser.safebrowsing.provider.google.gethashURL", type: "string" },
+  { id: "browser.safebrowsing.provider.google.updateURL", type: "string" },
+  /**** Prefs that require changing a lockPref ****/
+  // Google safe browsing check downloads
+  //{ id: "browser.safebrowsing.downloads.enabled", type: "bool" }, //Also already added
+  { id: "toolkit.legacyUserProfileCustomizations.stylesheets", type: "bool" },
+  // Canvas UI when blocked
+  {
+    id: "privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts",
+    type: "bool",
+  },
+]);
+
+var gLibrewolfPane = {
+  _pane: null,
+
+  // called when the document is first parsed
+  init() {
+    this._pane = document.getElementById("paneLibrewolf");
+
+    // Set all event listeners on checkboxes
+    setBoolSyncListeners(
+      "librewolf-extension-update-checkbox",
+      ["extensions.update.autoUpdateDefault", "extensions.update.enabled"],
+      [true,                                  true                       ],
+    );
+    setBoolSyncListeners(
+      "librewolf-ipv6-checkbox",
+      ["network.dns.disableIPv6"],
+      [false,                   ],
+    );
+    setBoolSyncListeners(
+      "librewolf-ocsp-checkbox",
+      ["security.OCSP.require"],
+      [true,                   ],
+    );
+    setBoolSyncListeners(
+      "librewolf-sync-checkbox",
+      ["identity.fxaccounts.enabled"],
+      [true,                   ],
+    );
+    setBoolSyncListeners(
+      "librewolf-autocopy-checkbox",
+      ["clipboard.autocopy", "middlemouse.paste"],
+      [true,                 true               ],
+    );
+    setBoolSyncListeners(
+      "librewolf-styling-checkbox",
+      ["toolkit.legacyUserProfileCustomizations.stylesheets"],
+      [true,                                                ],
+    );
+
+    setBoolSyncListeners(
+      "librewolf-webgl-checkbox",
+      ["webgl.disabled"],
+      [false           ],
+    );
+    setBoolSyncListeners(
+      "librewolf-rfp-checkbox",
+      ["privacy.resistFingerprinting"],
+      [true                          ],
+    );
+    setBoolSyncListeners(
+      "librewolf-auto-decline-canvas-checkbox",
+      ["privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts"],
+      [true                                      ],
+    );
+
+    setBoolSyncListeners(
+      "librewolf-letterboxing-checkbox",
+      ["privacy.resistFingerprinting.letterboxing"],
+      [true                                       ],
+    );
+
+    setSyncListeners(
+      "librewolf-goog-safe-checkbox",
+      [
+        "browser.safebrowsing.malware.enabled",
+        "browser.safebrowsing.phishing.enabled",
+        "browser.safebrowsing.blockedURIs.enabled",
+        "browser.safebrowsing.provider.google4.gethashURL",
+        "browser.safebrowsing.provider.google4.updateURL",
+        "browser.safebrowsing.provider.google.gethashURL",
+        "browser.safebrowsing.provider.google.updateURL",
+      ],
+      [
+        true,
+        true,
+        true,
+        "https://safebrowsing.googleapis.com/v4/fullHashes:find?$ct=application/x-protobuf&key=%GOOGLE_SAFEBROWSING_API_KEY%&$httpMethod=POST",
+        "https://safebrowsing.googleapis.com/v4/threatListUpdates:fetch?$ct=application/x-protobuf&key=%GOOGLE_SAFEBROWSING_API_KEY%&$httpMethod=POST",
+        "https://safebrowsing.google.com/safebrowsing/gethash?client=SAFEBROWSING_ID&appver=%MAJOR_VERSION%&pver=2.2",
+        "https://safebrowsing.google.com/safebrowsing/downloads?client=SAFEBROWSING_ID&appver=%MAJOR_VERSION%&pver=2.2&key=%GOOGLE_SAFEBROWSING_API_KEY%",
+      ],
+      [
+        false,
+        false,
+        false,
+        "",
+        "",
+        "",
+        "",
+      ]
+    );
+
+    setXOriginPolicySyncListeners(
+      "librewolf-xorigin-ref-checkbox",
+      "network.http.referer.XOriginPolicy",
+      [1, 2],
+      [0]
+    );
+
+    // Set event listener on open profile directory button
+    setEventListener("librewolf-open-profile", "command", openProfileDirectory);
+    // Set event listener on open about:config button
+    setEventListener("librewolf-config-link", "click", openAboutConfig);
+
+    // Notify observers that the UI is now ready
+    Services.obs.notifyObservers(window, "librewolf-pane-loaded");
+  },
+};
+
+function setXOriginPolicySyncListeners(checkboxid, pref, onVals, offVals) {
+  setSyncFromPrefListener(checkboxid, () => onVals.includes(getPref(pref)));
+  setSyncToPrefListener(checkboxid, () =>
+    writeGenericPrefs([pref], [2], [0], document.getElementById(checkboxid).checked)
+  );
+  Preferences.get(pref).on("change", () =>
+    makeMasterCheckboxesReactive(checkboxid, () =>
+      onVals.includes(getPref(pref))
+    )
+  );
+}
+
+function openProfileDirectory() {
+  // Get the profile directory.
+  let currProfD = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  let profileDir = currProfD.path;
+
+  // Show the profile directory.
+  let nsLocalFile = Components.Constructor(
+    "@mozilla.org/file/local;1",
+    "nsIFile",
+    "initWithPath"
+  );
+  new nsLocalFile(profileDir).reveal();
+}
+
+function openAboutConfig() {
+  window.open("about:config", "_blank");
+}
+
+function setBoolSyncListeners(checkboxid, opts, vals) {
+  setSyncFromPrefListener(checkboxid, () => readGenericBoolPrefs(opts, vals));
+  setSyncToPrefListener(checkboxid, () => writeGenericBoolPrefs(opts, vals, document.getElementById(checkboxid).checked));
+  for (let i = 1; i < opts.length; i++) {
+    Preferences.get(opts[i]).on("change", () => makeMasterCheckboxesReactive(checkboxid, () => readGenericBoolPrefs(opts, vals)));
+  }
+}
+function setSyncListeners(checkboxid, opts, onVals, offVals) {
+  setSyncFromPrefListener(checkboxid, () => readGenericPrefs(opts, onVals, offVals));
+  setSyncToPrefListener(checkboxid, () => writeGenericPrefs(opts, onVals, offVals, document.getElementById(checkboxid).checked));
+  for (let i = 1; i < opts.length; i++) {
+    Preferences.get(opts[i]).on("change", () => makeMasterCheckboxesReactive(checkboxid, () => readGenericPrefs(opts, onVals, offVals)));
+  }
+}
+
+function makeMasterCheckboxesReactive(checkboxid, func) {
+  const shouldBeChecked = func();
+  document.getElementById(checkboxid).checked = shouldBeChecked;
+}
+
+// Wrapper function in case something more is required (as I suspected in the first iteration of this)
+function getPref(pref) {
+  const retval = Preferences.get(pref);
+/*  if (retval === undefined) {
+    return defaultValue;
+  } */
+  return retval._value;
+}
+// Returns true if all the preferences in prefs are equal to onVals, false otherwise TODO may need a third array for their default values because mozilla is dumb, after testing though pretty sure this was misinformation being spread by comments in default FF code that has long since been fixed
+function readGenericBoolPrefs(prefs, onVals) {
+  for (let i = 0; i < prefs.length; i++) {
+    if (getPref(prefs[i]) != onVals[i]) {
+      return false;
+    }
+  }
+  return true;
+}
+function writeGenericBoolPrefs(opts, vals, changeToOn) {
+  valsCopy = [...vals];
+  if (!changeToOn) {
+    for (let i = 0; i < vals.length; i++) {
+      valsCopy[i] = !vals[i];
+    }
+  }
+  // Start at 1 because returning sets the last one
+  for (let i = 1; i < vals.length; i++) {
+    Services.prefs.setBoolPref(opts[i], valsCopy[i]);
+  }
+  return valsCopy[0];
+}
+
+// Returns true if all the preferences in prefs are equal to onVals, false otherwise... currently the same as for Bool as offVals is ignored
+function readGenericPrefs(prefs, onVals, offVals) {
+  for (let i = 0; i < prefs.length; i ++) {
+    let temp = getPref(prefs[i]);
+    if (getPref(prefs[i]) != onVals[i]) {
+      return false;
+    }
+  }
+  return true;
+}
+function writeGenericPrefs(opts, onVals, offVals, changeToOn) {
+  let writeArr = (changeToOn) ? onVals : offVals;
+  for (let i = 1; i < opts.length; i++) {
+    let type = typeof(writeArr[i]);
+    if (type == "number") {
+      Services.prefs.setIntPref(opts[i], writeArr[i]);
+    } else if (type == "boolean") {
+      Services.prefs.setBoolPref(opts[i], writeArr[i]);
+    } else if (type == "string") {
+      Services.prefs.setCharPref(opts[i], writeArr[i]);
+    } else {
+      console.log("BADNESS 10000");
+    }
+  }
+  return writeArr[0];
+}
+
+Preferences.get("identity.fxaccounts.enabled").on("change", () => {
+  confirmRestartPrompt(
+    Services.prefs.getBoolPref("identity.fxaccounts.enabled"), // Restart is required to *enable* / *disable* the pref
+    1, // Default Button Index
+    true, // Cancel instead of Revert Button
+    false // No Restart Later button
+  ).then(buttonIndex => {
+    if (buttonIndex == CONFIRM_RESTART_PROMPT_RESTART_NOW) {
+      Services.startup.quit(
+        Ci.nsIAppStartup.eAttemptQuit | Ci.nsIAppStartup.eRestart
+      );
+      return;
+    }
+  });
+});
diff --git a/browser/components/preferences/preferences.js b/browser/components/preferences/preferences.js
index 0b97e8c3cb59..637090adaa5e 100644
--- a/browser/components/preferences/preferences.js
+++ b/browser/components/preferences/preferences.js
@@ -8,6 +8,7 @@
 /* import-globals-from search.js */
 /* import-globals-from containers.js */
 /* import-globals-from privacy.js */
+/* import-globals-from librewolf.js */
 /* import-globals-from sync.js */
 /* import-globals-from experimental.js */
 /* import-globals-from moreFromMozilla.js */
@@ -191,6 +192,7 @@ function init_all() {
   register_module("paneHome", gHomePane);
   register_module("paneSearch", gSearchPane);
   register_module("panePrivacy", gPrivacyPane);
+  register_module("paneLibrewolf", gLibrewolfPane);
   register_module("paneContainers", gContainersPane);
   if (Services.prefs.getBoolPref("browser.preferences.experimental")) {
     // Set hidden based on previous load's hidden value.
diff --git a/browser/components/preferences/preferences.xhtml b/browser/components/preferences/preferences.xhtml
index 6ee14eec9b2e..a0d768dce307 100644
--- a/browser/components/preferences/preferences.xhtml
+++ b/browser/components/preferences/preferences.xhtml
@@ -13,6 +13,7 @@
 <?xml-stylesheet href="chrome://browser/skin/preferences/search.css"?>
 <?xml-stylesheet href="chrome://browser/skin/preferences/containers.css"?>
 <?xml-stylesheet href="chrome://browser/skin/preferences/privacy.css"?>
+<?xml-stylesheet href="chrome://browser/skin/preferences/librewolf.css"?>
 
 <!DOCTYPE html>
 
@@ -129,6 +130,17 @@
           <label class="category-name" flex="1" data-l10n-id="pane-privacy-title"></label>
         </richlistitem>
 
+        <richlistitem id="category-librewolf"
+                      class="category"
+                      value="paneLibrewolf"
+                      helpTopic="prefs-librewolf"
+                      data-l10n-id="category-librewolf"
+                      data-l10n-attrs="tooltiptext"
+                      align="center">
+          <image class="category-icon"/>
+          <label class="category-name" flex="1" data-l10n-id="pane-librewolf-title"></label>
+        </richlistitem>
+
         <richlistitem id="category-sync"
                       class="category"
                       hidden="true"
@@ -207,6 +219,7 @@
 #include home.inc.xhtml
 #include search.inc.xhtml
 #include privacy.inc.xhtml
+#include librewolf.inc.xhtml
 #include containers.inc.xhtml
 #include sync.inc.xhtml
 #include experimental.inc.xhtml
diff --git a/browser/locales/en-US/browser/preferences/preferences.ftl b/browser/locales/en-US/browser/preferences/preferences.ftl
index b10403800c7a..7f9bc2760342 100644
--- a/browser/locales/en-US/browser/preferences/preferences.ftl
+++ b/browser/locales/en-US/browser/preferences/preferences.ftl
@@ -1413,3 +1413,98 @@ httpsonly-radio-disabled =
 desktop-folder-name = Desktop
 downloads-folder-name = Downloads
 choose-download-folder-title = Choose Download Folder:
+
+# Variables:
+#   $service-name (String) - Name of a cloud storage provider like Dropbox, Google Drive, etc...
+save-files-to-cloud-storage =
+    .label = Save files to { $service-name }
+
+## LibreWolf preferences
+
+# Sidebar
+pane-librewolf-title = LibreWolf
+category-librewolf =
+    .tooltiptext = about:config changes, logically grouped and easily accessible
+
+# Main content
+librewolf-header = LibreWolf Preferences
+librewolf-warning-title = Heads up!
+librewolf-warning-description = We carefully choose default settings to focus on privacy and security. When changing these settings, read the descriptions to understand the implications of those changes.
+
+# Page Layout
+librewolf-general-heading = Browser Behavior
+librewolf-extension-update-checkbox =
+    .label = Update add-ons automatically
+librewolf-sync-checkbox =
+    .label = Enable Firefox Sync
+librewolf-autocopy-checkbox =
+    .label = Enable middle click paste
+librewolf-styling-checkbox = 
+    .label = Allow userChrome.css customization
+
+librewolf-network-heading = Networking
+librewolf-ipv6-checkbox =
+    .label = Enable IPv6
+
+librewolf-privacy-heading = Privacy
+librewolf-xorigin-ref-checkbox =
+    .label = Limit cross-origin referrers
+
+librewolf-broken-heading = Fingerprinting
+librewolf-webgl-checkbox =
+    .label = Enable WebGL
+librewolf-rfp-checkbox =
+    .label = Enable ResistFingerprinting
+librewolf-auto-decline-canvas-checkbox =
+    .label = Silently block canvas access requests
+librewolf-letterboxing-checkbox =
+    .label = Enable letterboxing
+
+librewolf-security-heading = Security
+librewolf-ocsp-checkbox =
+    .label = Enforce OCSP hard-fail
+librewolf-goog-safe-checkbox =
+    .label = Enable Google Safe Browsing
+librewolf-goog-safe-download-checkbox =
+    .label = Scan downloads
+
+# In-depth descriptions
+librewolf-extension-update-description = Keep extensions up to date without manual intervention. A good choice for your security.
+librewolf-extension-update-warning1 = If you don't review the code of your extensions before every update, you should enable this option.
+
+librewolf-ipv6-description = Allow { -brand-short-name } to connect using IPv6.
+librewolf-ipv6-warning1 = Before you change this, make sure your OS uses the IPv6 privacy extension.
+librewolf-ocsp-description = Prevent connecting to a website if the OCSP check cannot be performed.
+librewolf-ocsp-warning1 = This increases security, but it will cause breakage when an OCSP server is down.
+librewolf-sync-description = Sync your data with other browsers. Requires restart.
+librewolf-sync-warning1 = Firefox Sync encrypts data locally before transmitting it to the server.
+
+librewolf-autocopy-description = Select some text to copy it, then paste it with a middle-mouse click.
+
+librewolf-styling-description = Enable this if you want to customize the UI with a manually loaded theme.
+librewolf-styling-warning1 = Make sure you trust the provider of the theme.
+
+librewolf-xorigin-ref-description = Send a referrer only on same-origin.
+librewolf-xorigin-ref-warning1 = This causes breakage. Additionally, even when sent referrers will still be trimmed.
+
+librewolf-webgl-description = WebGL is a strong fingerprinting vector.
+librewolf-webgl-warning1 = If you need to enable it, consider using an extension like Canvas Blocker.
+
+librewolf-rfp-description = ResistFingerprinting is the best in class anti-fingerprinting tool.
+librewolf-rfp-warning1 = If you need to disable it, consider using an extension like Canvas Blocker.
+
+librewolf-auto-decline-canvas-description = Automatically deny canvas access to websites, without prompting the user.
+librewolf-auto-decline-canvas-warning1 = It is still possible to allow canvas access from the urlbar.
+
+librewolf-letterboxing-description = Letterboxing applies margins around your windows, in order to return a limited set of rounded resolutions.
+
+librewolf-goog-safe-description = If you are worried about malware and phishing, consider enabling it.
+librewolf-goog-safe-warning1 = Disabled over censorship concerns but recommended for less advanced users. All the checks happen locally.
+
+librewolf-goog-safe-download-description = Allow Safe Browsing to scan your downloads to identify suspicious files.
+librewolf-goog-safe-download-warning1 = All the checks happen locally.
+
+# Footer
+librewolf-footer = Useful links
+librewolf-config-link = All advanced settings (about:config)
+librewolf-open-profile = Open user profile directory
diff --git a/browser/themes/shared/jar.inc.mn b/browser/themes/shared/jar.inc.mn
index 4a88a1cc318d..2d7ac15e9b48 100644
--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -106,6 +106,7 @@
   skin/classic/browser/preferences/android-menu.svg            (../shared/preferences/android-menu.svg)
   skin/classic/browser/preferences/category-general.svg        (../shared/preferences/category-general.svg)
   skin/classic/browser/preferences/category-privacy-security.svg    (../shared/preferences/category-privacy-security.svg)
+  skin/classic/browser/preferences/category-librewolf.svg    (../shared/preferences/category-librewolf.svg)
   skin/classic/browser/preferences/category-search.svg         (../shared/preferences/category-search.svg)
   skin/classic/browser/preferences/category-sync.svg           (../shared/preferences/category-sync.svg)
   skin/classic/browser/preferences/containers.css              (../shared/preferences/containers.css)
@@ -128,6 +129,7 @@
   skin/classic/browser/preferences/vpn-logo.svg                (../shared/preferences/vpn-logo.svg)
   skin/classic/browser/preferences/search.css                  (../shared/preferences/search.css)
   skin/classic/browser/preferences/siteDataSettings.css        (../shared/preferences/siteDataSettings.css)
+  skin/classic/browser/preferences/librewolf.css               (../shared/preferences/librewolf.css)
   skin/classic/browser/spotlight.css                           (../shared/spotlight.css)
   skin/classic/browser/upgradeDialog/abstract.png              (../shared/upgradeDialog/abstract.png)
   skin/classic/browser/upgradeDialog/cheers.png                (../shared/upgradeDialog/cheers.png)
diff --git a/browser/themes/shared/preferences/category-librewolf.svg b/browser/themes/shared/preferences/category-librewolf.svg
new file mode 100644
index 000000000000..8ebf2ebe19a9
--- /dev/null
+++ b/browser/themes/shared/preferences/category-librewolf.svg
@@ -0,0 +1,96 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. 
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" width="20" height="20" fill="context-fill" fill-opacity="context-fill-opacity">
+  <path d="M15.5 9 15 9l0-4A5 5 0 0 0 5 5l0 4-.5 0A2.5 2.5 0 0 0 2 11.5l0 6A2.5 2.5 0 0 0 4.5 20l11 0a2.5 2.5 0 0 0 2.5-2.5l0-6A2.5 2.5 0 0 0 15.5 9zm-9-4c0-1.93 1.57-3.5 3.5-3.5 1.93 0 3.5 1.57 3.5 3.5l0 4-7 0 0-4zm10 12.7-.8.8-11.4 0-.8-.8 0-6.4.8-.8 11.4 0 .8.8 0 6.4z"/>
+</svg>
+-->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="67.733337mm"
+   height="67.733337mm"
+   viewBox="0 0 67.733337 67.733337"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   sodipodi:docname="LibreWolf.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.9899495"
+     inkscape:cx="-15.106575"
+     inkscape:cy="110.91343"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1366"
+     inkscape:window-height="711"
+     inkscape:window-x="0"
+     inkscape:window-y="30"
+     inkscape:window-maximized="1"
+     inkscape:showpageshadow="false"
+     units="px"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-42.106554,-153.8982)">
+    <circle
+       style="fill:#00acff;fill-opacity:1;stroke:none;stroke-width:0.53545821;stroke-miterlimit:4;stroke-dasharray:none"
+       id="path875"
+       cx="75.973221"
+       cy="187.76486"
+       r="33.866669" />
+    <path
+       style="fill:#ffffff;stroke-width:0.13229167"
+       d="m 72.543594,214.67719 c -4.744093,-0.60875 -9.281981,-2.49991 -13.241953,-5.51858 -1.29157,-0.98455 -3.714943,-3.42363 -4.772834,-4.80375 -2.96241,-3.86476 -4.804479,-8.2508 -5.41218,-12.88661 -0.260164,-1.98464 -0.258719,-5.63349 0.0029,-7.44738 1.308078,-9.0677 7.01463,-16.8454 15.20915,-20.72918 3.811512,-1.80647 7.300266,-2.57114 11.730683,-2.57114 7.165903,0 13.5265,2.56749 18.680882,7.54063 2.483054,2.39575 4.148141,4.66808 5.573968,7.60677 1.92868,3.9751 2.70979,7.43276 2.70979,11.99526 0,6.00619 -1.7345,11.24407 -5.336957,16.11672 -1.070527,1.44797 -3.161747,3.64749 -4.549468,4.78507 -3.806562,3.12041 -8.658642,5.23183 -13.473174,5.86296 -1.663528,0.21807 -5.593318,0.24524 -7.120854,0.0492 z m 10.041381,-4.86547 c 2.898391,-0.91366 5.260364,-2.14146 7.540624,-3.91979 1.212494,-0.9456 3.308223,-3.06144 4.186916,-4.22711 2.38328,-3.16162 4.004927,-7.12196 4.482067,-10.94597 0.229814,-1.84182 0.09634,-5.73827 -0.2545,-7.4296 -0.9294,-4.48046 -2.931647,-8.26499 -6.086007,-11.50342 -1.966575,-2.01898 -3.756882,-3.34972 -6.060203,-4.50458 -3.495001,-1.75236 -6.489835,-2.46043 -10.423481,-2.46442 -4.164073,-0.004 -7.815325,0.95024 -11.429055,2.98766 -3.289753,1.85476 -6.690628,5.25952 -8.553227,8.563 -1.371786,2.43299 -2.37583,5.32029 -2.767595,7.95869 -0.256867,1.72991 -0.261933,5.16508 -0.01006,6.82145 0.504067,3.31489 1.761474,6.59111 3.584314,9.33904 0.995409,1.50058 0.964154,1.48393 1.842248,0.98153 1.570774,-0.8987 1.980396,-1.33342 2.836087,-3.00984 1.000624,-1.96036 2.070459,-3.6735 3.037094,-4.86332 1.115822,-1.37347 1.269228,-1.61793 1.828988,-2.9147 0.281654,-0.65249 0.786977,-1.61074 1.122938,-2.12943 l 0.61084,-0.94309 -0.79023,-0.77671 c -1.049647,-1.03168 -1.922751,-2.2016 -2.087012,-2.79651 -0.167761,-0.60758 0.03021,-0.9466 0.818744,-1.40207 0.797354,-0.46057 1.367585,-0.5929 3.498657,-0.81193 1.037629,-0.10665 2.164153,-0.30199 2.518962,-0.43681 0.353024,-0.13414 1.407825,-0.70824 2.344001,-1.27579 2.702947,-1.63863 2.931619,-1.72344 4.552111,-1.68831 1.368686,0.0297 1.371262,0.0291 2.182813,-0.46143 1.700674,-1.02802 4.14305,-2.88289 7.357044,-5.58733 0.61632,-0.5186 1.21002,-0.92569 1.31934,-0.90464 0.45462,0.0876 1.289567,2.13636 1.416407,3.47562 0.07693,0.81225 -0.08023,1.6155 -0.562014,2.87261 -0.13146,0.34301 -0.19208,0.67043 -0.134706,0.7276 0.13774,0.13726 0.610706,-0.4535 0.610706,-0.76279 0,-0.39435 0.261127,-0.43936 0.616327,-0.10623 0.258235,0.24218 0.480842,0.31151 1.000202,0.31151 0.567073,0 0.707447,0.0526 0.928773,0.3479 0.375574,0.50112 0.463647,1.86688 0.176201,2.73231 -0.279641,0.84191 -1.124801,1.81287 -1.891829,2.17341 -0.686334,0.32262 -2.075841,1.67928 -2.726081,2.66164 -0.248906,0.37604 -0.715586,1.15995 -1.037066,1.74204 -0.321487,0.58208 -0.86074,1.46154 -1.19834,1.95436 -0.664294,0.96972 -1.233147,2.3224 -1.782214,4.23798 -0.322553,1.1253 -0.34962,1.41826 -0.362953,3.92797 -0.01613,3.0317 -0.172894,3.77561 -0.9925,4.7091 -0.931805,1.06126 -1.861937,3.39186 -1.940127,4.8613 -0.04935,0.92751 -0.192246,1.83164 -0.395304,2.50122 -0.08942,0.29484 0.07752,0.2914 1.072102,-0.0221 z"
+       id="path847"
+       inkscape:connector-curvature="0" />
+    <path
+       sodipodi:type="star"
+       style="fill:#00acff;fill-opacity:1;stroke:none;stroke-width:1.5;stroke-miterlimit:4;stroke-dasharray:none"
+       id="path814"
+       sodipodi:sides="4"
+       sodipodi:cx="18.854025"
+       sodipodi:cy="172.98837"
+       sodipodi:r1="1.6036172"
+       sodipodi:r2="1.1339285"
+       sodipodi:arg1="1.5707963"
+       sodipodi:arg2="2.3561945"
+       inkscape:flatsided="true"
+       inkscape:rounded="0"
+       inkscape:randomized="0"
+       d="m 18.854025,174.59199 -1.603617,-1.60362 1.603617,-1.60361 1.603617,1.60361 z"
+       transform="matrix(0.23203125,0.40188991,-0.99392962,0.57384553,246.21921,73.888081)" />
+  </g>
+</svg>
+
diff --git a/browser/themes/shared/preferences/librewolf.css b/browser/themes/shared/preferences/librewolf.css
new file mode 100644
index 000000000000..12f926ab7018
--- /dev/null
+++ b/browser/themes/shared/preferences/librewolf.css
@@ -0,0 +1,23 @@
+.librewolf-collapse > input {
+	display: none;
+}
+.librewolf-collapse > input ~ .librewolf-collapsed {
+	display: none;
+	/* max-height: 0; */
+	transition: max-height 0.25s ease-in-out;
+}
+.librewolf-collapse > input:checked ~ .librewolf-collapsed {
+	display: block;
+	/* max-height: 20rem; */
+}
+.librewolf-warning {
+	display: inline;
+	font-size: 0.8em;
+}
+.librewolf-button-icon {
+	width: 16px;
+	height: 16px;
+	margin-right: 8px;
+	-moz-context-properties: fill, fill-opacity;
+	fill: currentColor;
+}
diff --git a/browser/themes/shared/preferences/preferences.css b/browser/themes/shared/preferences/preferences.css
index 74493f3c59c4..2f3623cf6631 100644
--- a/browser/themes/shared/preferences/preferences.css
+++ b/browser/themes/shared/preferences/preferences.css
@@ -222,6 +222,10 @@ checkbox {
   list-style-image: url("chrome://browser/skin/preferences/category-privacy-security.svg");
 }
 
+#category-librewolf > .category-icon {
+  list-style-image: url("chrome://browser/skin/preferences/category-librewolf.svg");
+}
+
 #category-sync > .category-icon {
   list-style-image: url("chrome://browser/skin/preferences/category-sync.svg");
 }
-- 
2.36.1