Firefox
Updated 8 March 2019
Mozilla Firefox provides many integrated tools for a detailed configuration.
To get to the hidden settings of Firefox, go to the following:
about:config
Default settings
| parameter |
value |
description |
| browser.fixup.alternate.suffix |
.ru |
Domain name extension |
| browser.startup.homepage |
http://start.calculate-linux.org |
Firefox start page |
| browser.startup.homepage_override.mstone |
ignore |
Skip first launch setup |
| browser.tabs.warnOnClose |
false |
Do not warn when closing more that one tab |
| font.name.monospace.x-cyrillic |
Droid Sans Mono Slashed |
|
| font.name.sans-serif.x-cyrillic |
Droid Sans |
|
| font.name.serif.x-cyrillic |
Times New Roman |
|
| parameter |
value |
description |
| browser.cache.disk.capacity |
102400 |
Disk cache, requires disabling "browser.cache.disk.smart_size.enabled" |
| browser.cache.disk.smart_size.enabled |
false |
Disables cache size auto-tuning |
| browser.cache.use_new_backend |
1 |
1 |
| Enable the new HTTP caching system. Improves the responsiveness of the interface |
|
|
|
|
|
| browser.sessionhistory.max_total_viewers |
3 |
Maximum number of cached pages in each tab |
| browser.sessionstore.interval |
60000 |
Autosave interval in milliseconds |
| browser.tabs.animate |
false |
Tab animation. Disabling this accelerates tab moving, page opening, etc. |
| browser.tabs.remote.autostart |
true |
Multiprocessor mode |
| browser.tabs.remote.autostart |
true |
Processing each tab in a separate process |
| dom.ipc.plugins.asyncdrawing.enabled |
true |
|
| dom.ipc.plugins.asyncInit.enabled |
true |
Asynchronous plugin initialization |
| dom.ipc.processCount |
4 |
Number of processors used (support enabled in browser.tabs.remote.autostart) |
| javascript.options.asyncstack |
true |
Asynchronous stacking |
| memory.free_dirty_pages |
true |
Releasing unused pages after closing tabs |
| memory.free_dirty_pages |
true |
Releases memory after closing tabs |
| network.http.pipelining.max-optimistic-requests |
8 |
Maximum number of requests |
| network.http.pipelining.ssl |
true |
Pipeline requests via SSL connection |
| network.http.pipelining |
true |
Use multiple queries in one connection to the server |
| network.http.proxy.pipelining |
true |
Use multiple queries in one connection to the server when using a proxy |
| network.dnsCacheEntries |
200 |
Number of cached DNS names |
| network.dnsCacheExpiration |
240 |
Time in seconds after which the DNS cache expires |
| network.http.request.max-start-delay |
5 |
Time in seconds before establishing a new connection to the server, to pause queries before creating a new connection |
| browser.sessionstore.max_tabs_undo |
5 |
Number of Firefox tabs that you can reopen if they close |
| browser.sessionstore.max_windows_undo |
2 |
Number of recently closed windows, similar to browser.sessionstore.max_tabs_undo |
| browser.bookmarks.max_backups |
2 |
Number of backups for Firefox to close faster |
| browser.newtabpage.enhanced |
false |
Do not suggest sites in new page tabs. "datareporting.sessions.current.clean" must be enabled |
| datareporting.sessions.current.clean |
true |
Do not collect information about the pages viewed. Option required to disable "browser.newtabpage.enhanced" |
| extensions.e10sBlockedByAddons |
false |
Allow to block multiprocessing by extensions |
| extensions.e10sBlocksEnabling |
false |
Allow to block multiprocessing |
Do not collect Firefox usage statistics. Reduce memory consumption, stop sending data to Mozilla, for privacy and performance reasons
| parameter |
value |
| browser.selfsupport.url |
[HTML_REMOVED] |
| browser.tabs.crashReporting.sendReport |
false |
| datareporting.healthreport.about.reportUrl |
[HTML_REMOVED] |
| datareporting.healthreport.infoURL |
[HTML_REMOVED] |
| datareporting.healthreport.uploadEnabled |
false |
| dom.ipc.plugins.flash.subprocess.crashreporter.enabled |
false |
| dom.ipc.plugins.reportCrashURL |
false |
| experiments.enabled |
false |
| experiments.manifest.uri |
[HTML_REMOVED] |
| experiments.supported |
[HTML_REMOVED] |
| extensions.getAddons.cache.enabled |
false |
| network.allow-experiments |
false |
| security.ssl.errorReporting.enabled |
false |
| toolkit.crashreporter.infoURL |
[HTML_REMOVED] |
| toolkit.telemetry.archive.enabled |
false |
| toolkit.telemetry.cachedClientID |
[HTML_REMOVED] |
| toolkit.telemetry.infoURL |
[HTML_REMOVED] |
| toolkit.telemetry.server |
[HTML_REMOVED] |
Disable integrated social services
| parameter |
value |
| social.directories |
[HTML_REMOVED] |
| social.remote-install.enabled |
false |
| social.share.activationPanelEnabled |
false |
| social.shareDirectory |
[HTML_REMOVED] |
| social.toast-notifications.enabled |
false |
| social.whitelist |
[HTML_REMOVED] |
Disable the "Pocket" service and delete your ID, thus making your browser anonymous
| parameter |
value |
| extensions.pocket.api |
[HTML_REMOVED] |
| extensions.pocket.enabled |
false |
| extensions.pocket.oAuthConsumerKey |
[HTML_REMOVED] |
| extensions.pocket.site |
[HTML_REMOVED] |
Consider the SSL connection as untrusted if the query for a repeated "session renegotiation" is incorrect
| parameter |
value |
| security.ssl.treat_unsafe_negotiation_as_broken |
true |
Disable sharing and geolocation
| parameter |
value |
| browser.search.geoip.url |
[HTML_REMOVED] |
| geo.enabled |
false |
| geo.wifi.uri |
[HTML_REMOVED] |
Force proxy off (by default, system settings will be used)
| parameter |
value |
| network.proxy.type |
0 |
Prevent scripts from manipulating Firefox windows
| parameter |
value |
| dom.disable_beforeunload |
true |
| dom.disable_window_move_resize |
true |
| dom.disable_window_open_feature.close |
true |
| dom.disable_window_open_feature.menubar |
true |
| dom.disable_window_open_feature.minimizable |
true |
| dom.disable_window_open_feature.personalbar |
true |
| dom.disable_window_open_feature.titlebar |
true |
| dom.disable_window_open_feature.toolbar |
true |
Forbid sending tracking "pings" when clicking on links and closing pages
| parameter |
value |
| beacon.enabled |
false |
Disable the Adobe Primetime Content Decryption Module (DRM) plugin, which allows to track your browser
| parameter |
value |
| browser.eme.ui.enabled |
false |
| media.eme.apiVisible |
false |
Disable access from sites to cameras and microphones. Disable other multimedia features that are not used on regular sites, but are a threat to privacy or security
| parameter |
value |
| camera.control.face_detection.enabled |
false |
| media.getusermedia.screensharing.allowed_domains |
[HTML_REMOVED] |
| media.getusermedia.screensharing.enabled |
false |
| media.navigator.enabled |
false |
| media.video_stats.enabled |
false |
Enable statistics
| parameter |
value |
description |
| browser.search.suggest.enabled |
false |
Do not send search queries. If you have disabled this function, you will still get hints when trying to search something, but only based on the local search history. |
| dom.battery.enabled |
false |
Disable the Battery API monitor |
| dom.enable_performance |
false |
Do not send information about the start and end time of the page load. |
| extensions.getAddons.cache.enabled |
false |
Send information about the installed add-ons on a daily basis |
| network.http.pipelining.aggressive |
true |
Hold problematic connections to the server |
| network.proxy.socks_remote_dns |
true |
Disable DNS bypassing proxy settings |
Notifications
| parameter |
value |
description |
| browser.reader.detectedFirstArticle |
true |
Disable the "Read View" notification |
| privacy.trackingprotection.introCount |
20 |
Disable the "Hw does the tracking protection work" notification |
| general.warnOnAboutConfig |
false |
Warning when trying to go to about:config |
Miscellaneous
| parameter |
value |
description |
| browser.urlbar.trimURLs |
false |
Display the "http: //" prefix in the address bar |
| privacy.trackingprotection.enabled |
true |
Block suspicious sites that are not trusted in the Internet, as they are thought to be engaged in surveillance of users. Unfortunately, if you turn this off, you will not be allowed to see built-in Yandex maps with itineraries. |
| privacy.donottrackheader.enabled |
true |
Warn the sites that you do not want to be tracked |
| dom.popup_maximum |
5 |
Maximum number of pop-up windows opened by a script |
| browser.rights.3.shown |
true |
|
| Do not inform about the permissions |
|
|
| startup.homepage_welcome_url |
[HTML_REMOVED] |
Welcome line at the first start |
| browser.slowStartup.notificationDisabled |
true |
Disables calculation of browser startup time with warning if it starts slowly |
| offline-apps.allow_by_default |
false |
Do not use Offline App Cache without explicit permission from the user |