{
  /*** [SECTION 9999]: DEPRECATED / REMOVED / LEGACY / RENAMED
       Documentation denoted as [-]. Items deprecated in FF78 or earlier have been archived at [1],
       which also provides a link-clickable, viewer-friendly version of the deprecated bugzilla tickets
       [1] https://github.com/arkenfox/user.js/issues/123
  ***/
  /* ESR78.x still uses all the following prefs
  // [NOTE] replace the * with a slash in the line above to re-enable them
  // FF79
  // 0212: enforce fallback text encoding to match en-US
     // When the content or server doesn't declare a charset the browser will
     // fallback to the "Current locale" based on your application language
     // [TEST] https://hsivonen.com/test/moz/check-charset.htm
     // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/20025
     // [-] https://bugzilla.mozilla.org/1603712
  user_pref("intl.charset.fallback.override", "windows-1252");
  // FF82
  // 0206: disable geographically specific results/search engines e.g. "browser.search.*.US"
     // i.e. ignore all of Mozilla's various search engines in multiple locales
     // [-] https://bugzilla.mozilla.org/1619926
  user_pref("browser.search.geoSpecificDefaults", false);
  user_pref("browser.search.geoSpecificDefaults.url", "");
  // FF86
  // 1205: disable SSL Error Reporting
     // [1] https://firefox-source-docs.mozilla.org/browser/base/sslerrorreport/preferences.html
     // [-] https://bugzilla.mozilla.org/1681839
  user_pref("security.ssl.errorReporting.automatic", false);
  user_pref("security.ssl.errorReporting.enabled", false);
  user_pref("security.ssl.errorReporting.url", "");
  // 2653: disable hiding mime types (Options>General>Applications) not associated with a plugin
     // [-] https://bugzilla.mozilla.org/1581678
  user_pref("browser.download.hide_plugins_without_extensions", false);
  // FF87
  // 0105d: disable Activity Stream recent Highlights in the Library [FF57+]
     // [-] https://bugzilla.mozilla.org/1689405
     // user_pref("browser.library.activity-stream.enabled", false);
  // FF89
  // 0309: disable sending Flash crash reports
     // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed]
  user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
  // 0310: disable sending the URL of the website where a plugin crashed
     // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed]
  user_pref("dom.ipc.plugins.reportCrashURL", false);
  // 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+]
     // [1] https://bugzilla.mozilla.org/1190623
     // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed]
  user_pref("security.mixed_content.block_object_subrequest", true);
  // 1803: disable Flash plugin
     // 0=deactivated, 1=ask, 2=enabled
     // ESR52.x is the last branch to *fully* support NPAPI, FF52+ stable only supports Flash
     // [NOTE] You can still override individual sites via site permissions
     // [-] https://bugzilla.mozilla.org/1682030 [underlying NPAPI code removed]
  user_pref("plugin.state.flash", 0); // [DEFAULT: 1]
  // FF90
  // 0708: disable FTP [FF60+]
     // [-] https://bugzilla.mozilla.org/1574475
     // user_pref("network.ftp.enabled", false); // [DEFAULT: false FF88+]
  // 2730: enforce no offline cache storage (appCache) [FF71+]
     // [-] https://bugzilla.mozilla.org/1694662
  user_pref("browser.cache.offline.storage.enable", false); // [DEFAULT: false FF84+]
  // ***/
}