How to Get 3d Touch on Firefox Again

This article or department is a candidate for merging with Firefox#Tips and tricks.

Notes: Likewise overlaps with Firefox#Configuration; deciding if some particular topic should be here or on the master page is capricious. The "tweaks" are the backbone of the content related to Firefox, and so they should be directly on the chief page. The troubleshooting department can be split into a subpage if the result is deemed besides long. (Discuss in Talk:Firefox/Tweaks)

This page contains advanced Firefox configuration options and performance tweaks.

Performance

Improving Firefox's performance is divided into parameters that can be inputted while running Firefox or otherwise modifying its configuration as intended by the developers, and advanced procedures that involve foreign programs or scripts.

Note: Listed options may only be bachelor for the latest version of Firefox.

This section contains advanced Firefox options for performance tweaking. For additional information meet these MozillaZine articles.

Alter Performance settings

Firefox automatically uses settings based on the reckoner's hardware specifications [1].

Adjusting these settings can be done in Preferences or by changing the dom.ipc.processCount value to i-eight and browser.preferences.defaultPerformanceSettings.enabled to false manually in about:config.

Yet you may desire to manually arrange this setting to increase performance even further or decrease retentivity usage on low-finish devices.

In this case the Content process limit for the current user has been increased to 4:

$ ps -e | grep 'Spider web Content'

13991 tty1     00:00:04 Web Content 14027 tty1     00:00:09 Web Content 14031 tty1     00:00:20 Web Content 14040 tty1     00:00:26 Web Content

WebRender

WebRender is a high-performance, GPU-accelerated 2D rendering engine written in Rust. Information technology is the compositor that powers Firefox and the Servo browser engine project. As of Firefox 93, it is enabled by default for all users and uses hardware rendering by default if the hardware it is running on supports at to the lowest degree OpenGL 3.0 or OpenGL ES 3.0 (as of 2021-04) and meets minimum driver requirements. If your system does not run across these requirements it will fallback to software rendering using Software Webrender.

If you are experiencing rendering problems with up-to-appointment drivers on your motorcar, you tin strength-enable Software Webrender by setting the gfx.webrender.software preference to true in almost:config.

Cease urlclassifier3.sqlite from being created again

This article or section is out of appointment.

Reason: This communication seems not need anymore. (urlclassifier* files do not exist as of Firefox 64+.) (Talk over in Talk:Firefox/Tweaks)

Removing all urlclassifier* files can prevent the employ of megabytes of storage in your firefox profile. If y'all remove all the urlclassifier* files, you may find out that urlclassifier3.sqlite keeps growing once more after a certain fourth dimension. Here is a simple solution to avert it for now and ever.

$ cd ~/.mozilla/firefox/<profile_dir> $ repeat "" > urlclassifier3.sqlite $ chmod 400 urlclassifier3.sqlite

This effectively makes the file empty and and then read-only so Firefox cannot write to information technology anymore.

Plow off the deejay cache

Every object loaded (html page, jpeg epitome, css stylesheet, gif banner) is saved in the Firefox cache for futurity use without the demand to download it over again. It is estimated that simply a fraction of these objects volition be reused, usually virtually 30%. This is because of very short object expiration time, updates or simply user beliefs (loading new pages instead of returning to the ones already visited). The Firefox cache is divided into memory and disk cache and the latter results in frequent disk writes: newly loaded objects are written to memory and older objects are removed.

An culling approach is to use about:config settings:

Gear up browser.cache.disk.enable to faux
Verify that browser.enshroud.memory.enable is set to truthful, more information about this selection can exist found in the browser.enshroud.memory Mozilla commodity
Add the entry (correct click > new > integer) browser.enshroud.memory.capacity and set it to the amount of KB you want to spare, or to -ane for automatic enshroud size choice (skipping this step has the same event as setting the value to -1)
- The "automatic" size option is based on a decade-former table that just contains settings for systems at or below 8GB of organization retentiveness. The following formula very closely approximates this tabular array, and can be used to set the Firefox cache more dynamically: 41297 - (41606 / (one + ((RAM / one.xvi) ^ 0.75))), where RAM is in GB and the outcome is in KB.

This method has some drawbacks:

The content of currently browsed webpages is lost if the browser crashes or subsequently a reboot, this can exist avoided using anything-sync-daemon or whatsoever similar periodically-syncing script and then that cache gets copied over to the bulldoze on a regular basis
The settings need to exist configured for each user individually

Move disk enshroud to RAM

An culling is to movement the "deejay" cache to a RAM disk, giving you a solution in between the two above. The enshroud will now be preserved between Firefox runs (including Firefox crash recovery), just will be discarded upon reboot (including Bone crash).

To practice this, go to about:config and set browser.cache.disk.parent_directory to /run/user/UID/firefox, where UID is your user's ID which can be obtained by running id -u.

Open about:cache to verify the new disk cache location.

Longer interval betwixt session information record

Firefox stores the current session condition (opened urls, cookies, history and form data) to the disk on a regular basis. It is used to recover a previous session in case of crash. The default setting is to save the session every 15 seconds, resulting in frequent disk access.

To increase the save interval to 10 minutes (600000 milliseconds) for instance, change in about:config the setting of browser.sessionstore.interval to 600000

To disable completely this feature, change browser.sessionstore.resume_from_crash to false.

Defragment the profile'southward SQLite databases

Warning: This process may damage the databases in such a way that sessions are not saved properly.

Firefox keeps bookmarks, history, passwords in SQLite databases. SQLite databases become fragmented over time and empty spaces appear all around. But, since there are no managing processes checking and optimizing the database, these factors eventually result in a performance hit. A good mode to meliorate first-up and some other bookmarks and history related tasks is to defragment and trim unused space from these databases.

You can use profile-cleaner to practice this, while Firefox is not running:

profile-cleaner usage example:
SQLite database	Size Earlier	Size After	% change
urlclassifier3.sqlite	37 Thou	30 Chiliad	xix %
places.sqlite	16 Thousand	2.4 M	85 %

Firefox provides a tool to defragment and optimize the places database, which is the source of virtually slowdowns and profile corruptions. To access this tool, open the about:support page, search for Places Database and click the Verify Integrity button.

Cache the entire contour into RAM via tmpfs

If the system has retention to spare, tmpfs can be used to cache the entire profile directory, which might result in increased Firefox responsiveness.

Disable Pocket

If you lot do not use the Pocket-service, you may want to disable it by setting extensions.pocket.enabled to simulated in about:config.

Appearance

Fonts

Encounter the main article: Font configuration

Configure the DPI value

Modifying the post-obit value can assist meliorate the way fonts looks in Firefox if the arrangement'due south DPI is below 96. Firefox, past default, uses 96 and only uses the organization'south DPI if it is a higher value. To force the system's DPI regardless of its value, blazon virtually:config into the address bar and set layout.css.dpi to 0.

Annotation that the above method only affects the Firefox user interface'southward DPI settings. Web folio contents nonetheless use a DPI value of 96, which may look ugly or, in the case of high-resolution displays, may be rendered too modest to read. A solution is to change layout.css.devPixelsPerPx to system's DPI divided by 96. For example, if your system'due south DPI is 144, and so the value to add is 144/96 = 1.v. Changing layout.css.devPixelsPerPx to one.5 makes web folio contents use a DPI of 144, which looks much better.

See also HiDPI#Firefox for information almost HiDPI displays and [2] for calculating the DPI.

Default font settings from Microsoft Windows

Below are the default font preferences when Firefox is installed in Microsoft Windows. Many web sites use the Microsoft fonts.

Proportional: Serif Size (pixels): xvi Serif: Times New Roman Sans-serif: Arial Monospace: Courier New Size (pixels): xiii

General user interface CSS settings

Firefox's user interface can be modified by editing the userChrome.css and userContent.css files in ~/.mozilla/firefox/<profile_dir>/chrome/ (profile_dir is of the form hash.name, where the hash is an 8 character, seemingly random string and the contour proper name is usually default). Yous can find out the exact name past typing about:support in the URL bar, and searching for the Profile Directory field under the Application Basics section every bit described in the Firefox documentation.

Annotation:

The chrome/ binder and userChrome.css/userContent.css files may not necessarily exist, so they may need to be created.
toolkit.legacyUserProfileCustomizations.stylesheets must exist enabled in about:config.

This section just deals with the userChrome.css file which modifies Firefox's user interface, and non web pages.

Modify the interface font

The setting effectively overrides the global GTK font preferences, and does non touch on webpages, only the user interface itself:

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

* {     font-family unit: "FONT_NAME"; }

Hibernate button icons

Enables text-only buttons:

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

.button-box .button-icon {     display: none; }

Hiding various tab buttons

These settings hibernate the arrows that appear to the horizontal edges of the tab bar, the button that toggles the "all tabs" drop-down list, and the plus sign button that creates a new tab.

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

/* Tab bar */  .tabbrowser-strip *[class^="scrollbutton"] {     /* Hide tab scroll buttons */     display: none; }  .tabbrowser-strip *[form^="tabs-alltabs"] {     /* Hibernate tab drib-down listing */     brandish: none; }  .tabbrowser-strip *[grade^="tabs-newtab-push button"] {     /* Hide new-tab push button */     display: none; }

Horizontal tabs

To place the tab bar horizontally stacked along the sides of the browser window:

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

/* Brandish the tabbar on the left */ #content > tabbox {     -moz-box-orient: horizontal; }  .tabbrowser-strip {     -moz-box-orient: vertical;     /*      * You can ready this to -moz-scrollbars-vertical instead,      * but then the scrollbar will *ever* be visible.  this manner      * there is never a scrollbar, so it behaves like the tab bar      * unremarkably does      */      overflow: -moz-scrollbars-none; }  .tabbrowser-tabs {     -moz-box-orient: horizontal;     min-width: 20ex;   /* Yous may want to increment this value */     -mox-box-pack: start;     -moz-box-align: showtime; }  .tabbrowser-tabs > hbox {     -moz-box-orient: vertical;     -moz-box-align: stretch;     -moz-box-pack: get-go; }  .tabbrowser-tabs > hbox > tab {     -moz-box-align: start;     -moz-box-orient: horizontal; }

Hide championship bar and window border

To supersede the title bar with the tab bar, enable browser.tabs.drawInTitlebar in about:config.

Or go to "Carte du jour", then "Customize" and and then at the lesser-left corner find checkbox named "Title Bar". Uncheck information technology. If the checkbox is missing, make sure the XDG_CURRENT_DESKTOP environment variable is correctly set and/or the MOZ_GTK_TITLEBAR_DECORATION environs variable is set up to "client".

Hide only championship bar in KDE

With the setting above, Firefox adds in KDE the minimize/macimize/close buttons to the tab bar, but the title bar will however be at that place.

It can exist removed past right-clicking on it, then More Actions > Configure Special Application Settings. Add together a new property there for "No titlebar and frame" and be sure to not forget activating information technology, "Yes" must be chosen. (Every bit you have now no titlebar anymore there, to subsequently change the rule, y'all tin can go to System Settings > Window Management > Window Rules.)

Yet, that will besides remove the frame, it is basically impossible to change the window size. An alternative is go to System settings > Application Style > Window Decorations, choose "Breeze" and change its settings. In the last tab, Window-Specific Overrides, add a new 1. Use the button Detect Window Backdrop to become the name. There is a button Notice Window Properties. Alternatively, if you want to gear up this override for all windows, non simply Firefox, you can enter a dot (.) in the regex field. After, set the Ornament Options to hide the title bar only.

Auto-hide Bookmarks Toolbar

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

#PersonalToolbar {     visibility: collapse !important; }  #navigator-toolbox:hover > #PersonalToolbar {     visibility: visible !of import; }

~/.mozilla/firefox/<profile_dir>/chrome/userChrome.css

/* remove maximum/minimum  width brake of sidebar */ #sidebar {     max-width: none !important;     min-width: 0px !important; }

Unreadable input fields with dark GTK themes

When using a dark GTK theme, i might see Internet pages with unreadable input and text fields (e.g. text input field with white text on white groundwork, or black text on dark groundwork). This tin can happen because the site only sets either background or text colour, and Firefox takes the other one from the theme. To prevent Firefox from using theme's colors and dark themes in web pages respectively ostend browser.display.use_system_colors and widget.content.permit-gtk-dark-theme are set to simulated in about:config.

Otherwise, if the previous modification did non solve the issue, it is possible to launch Firefox with a light GTK theme by adding a new cord in near:config named widget.content.gtk-theme-override and setting it to a light theme like Breeze:calorie-free or Adwaita:low-cal.

Override input field color with CSS

Notation: Related bug has been resolved starting with 68. [3]

The extension Text Contrast for Dark Themes sets the other color as needed to maintain contrast.

Alternatively prepare the standard colors explicitly for all web pages in userContent.css or using the stylus add-on. The style canvass is normally located in your profile folder (visit about:profiles for the path) in chrome/userContent.css, if not you tin can create information technology there.

The following sets input fields to standard black text / white groundwork; both tin be overridden by the displayed site, so that colors are seen every bit intended:

Note: If you lot desire urlbar and searchbar to be white remove the two first :not css selectors.

input:non(.urlbar-input):not(.textbox-input):not(.form-control):not([type='checkbox']):not([type='radio']), textarea, select {     -moz-appearance: none !important;     background-color: white;     color: blackness; }  #downloads-indicator-counter {     color: white; }

Change the GTK theme

To force Firefox to use a lite theme (east.g. Adwaita) for both web content and UI, come across GTK#Themes.

Change the GTK theme for content procedure only

To force Firefox to use a calorie-free theme (eastward.k. Adwaita) for spider web content only:

Open about:config in the address bar.
Create a new widget.content.gtk-theme-override string type entry (right mouse push button > New > String).
Fix the value to the lite theme to use for rendering purposes (e.g. Adwaita:light).
Restart Firefox.

Web content CSS settings

This section deals with the userContent.css file in which y'all tin add custom CSS rules for spider web content. Changes to this file volition take upshot once the browser is restarted.

This file can be used for making small-scale fixes or to utilize personal styles to oftentimes visited websites. Custom stylesheets for popular websites are available from sources such equally userstyles.org. Yous tin can install an add together-on such equally superUserContent^{[dead link 2020-03-29 ⓘ]} to manage themes. This improver creates the directory chrome/userContent.css.d and applies changes to the CSS files therein when the page is refreshed.

Import other CSS files

~/.mozilla/firefox/<profile_dir>/chrome/userContent.css

@import url("./imports/some_file.css");

Block certain parts of a domain

~/.mozilla/firefox/<profile_dir>/chrome/userContent.css

@-moz-certificate domain(example.com) {     div#header {         background-image: none !of import;     }  }

Add [pdf] after links to PDF files

~/.mozilla/firefox/<profile_dir>/chrome/userContent.css

/* add '[pdf]' next to links to PDF files */ a[href$=".pdf"]:after {     font-size: smaller;     content: " [pdf]"; }

Cake ads

Meet floppymoose.com for an example of how to use userContent.css as a basic advertizement-blocker.

Mouse and keyboard

Mouse wheel scroll speed

To change the default values (i.e. speed-up) of the mouse wheel roll speed, go to about:config and search for mousewheel.acceleration. This will testify the available options, modifying the following:

Set mousewheel.dispatch.start to i.
Gear up mousewheel.acceleration.factor to the desired number (x to 20 are mutual values).

Mozilla's recommendation for increasing the mousewheel scroll speed is to:

Prepare mousewheel.default.delta_multiplier_y between 200 and 500 (default: 100)

Pixel-perfect trackpad scrolling

To enable 1-to-one trackpad scrolling (equally can be witnessed with GTK3 applications like Nautilus), set the MOZ_USE_XINPUT2=1 environment variable before starting Firefox.

If scrolling is undesirably jerky, try enabling Firefox's Use smooth scrolling option under Preferences > General > Browsing.

Enable touchscreen gestures

Make sure dom.w3c_touch_events.enabled is either set to 1 (enabled) or 2 (default, auto-find).

Add MOZ_USE_XINPUT2 DEFAULT=1 to /etc/security/pam_env.conf and then logout or reboot your organization for the changes to take result.

On some devices, it may be necessary to disable xinput's touchscreen gestures by running the following:

$ xsetwacom --set          device          Gesture off

Mouse click on URL bar'due south beliefs

In older versions of Firefox information technology was possible to tweak the behavior of the accost bar in nigh:config, but this has been removed in March 2020.

In order to for example disable the behavior that selects the contents of the accost bar on first click, or to let to double click the URL to select it in full, see user contributed scripts such as https://github.com/SebastianSimon/firefox-omni-tweaks

Smoothen scrolling

In order to go smoothen physics-based scrolling in Firefox, the general.smoothScroll.msdPhysics configurations can be changed to emulate a snappier behaviour like in other web browsers. For a quicker configuration, suspend the following to ~/.mozilla/firefox/your-profile/user.js (requires restart):

user_pref("general.smoothScroll.lines.durationMaxMS", 125); user_pref("full general.smoothScroll.lines.durationMinMS", 125); user_pref("general.smoothScroll.mouseWheel.durationMaxMS", 200); user_pref("general.smoothScroll.mouseWheel.durationMinMS", 100); user_pref("full general.smoothScroll.msdPhysics.enabled", true); user_pref("general.smoothScroll.other.durationMaxMS", 125); user_pref("full general.smoothScroll.other.durationMinMS", 125); user_pref("full general.smoothScroll.pages.durationMaxMS", 125); user_pref("general.smoothScroll.pages.durationMinMS", 125);

Additionally the mouse wheel scroll settings take to be changed to react in a polish manner as well:

user_pref("mousewheel.min_line_scroll_amount", thirty); user_pref("mousewheel.system_scroll_override_on_root_content.enabled", true); user_pref("mousewheel.system_scroll_override_on_root_content.horizontal.factor", 175); user_pref("mousewheel.system_scroll_override_on_root_content.vertical.cistron", 175); user_pref("toolkit.scrollbox.horizontalScrollDistance", 6); user_pref("toolkit.scrollbox.verticalScrollDistance", 2);

If you have troubles on machines with varying performance, try modifying the mousewheel.min_line_scroll_amount until information technology feels snappy enough.

Notation: On Wayland, whatsoever of these settings may be rendered completely ineffective by apz.gtk.kinetic_scroll.enabled, which defaults to true. If yous find that these tweaks exercise not piece of work, try setting this value to simulated.

Set backspace'due south behavior

See Firefox#Backspace does not piece of work as the 'Dorsum' button.

Disable center mouse push clipboard paste

Run into Firefox#Heart-click behavior.

Emacs primal bindings

To have Emacs/Readline-like key bindings active in text fields, see GTK#Emacs fundamental bindings.

Miscellaneous

Force-enable hardware video decoding

Although media.hardware-video-decoding.enabled is enabled by default, one may need to force-enable hardware video decoding by setting media.hardware-video-decoding.force-enabled to true.

Remove full screen warning

Warning near video displayed in full screen mode ("… is now fullscreen") can be disabled by setting full-screen-api.alert.timeout to 0 in about:config.

Alter the society of search engines in the Firefox Search Bar

To change the order search engines are displayed in:

Open the drop-down list of search engines and click Manage Search Engines... entry.
Highlight the engine yous want to movement and utilise Motion Upward or Move Down to movement it. Alternatively, you can utilize drag-and-drop.

"I'm Feeling Lucky" mode

Some search engines have a "feeling lucky" feature. For example, Google has "I'm Feeling Lucky", and DuckDuckGo has "I'm Feeling Ducky".

To activate them, search for keyword.url in about:config and modify its value (if any) to the URL of the search engine.

For Google, set up information technology to:

https://www.google.com/search?btnI=I%27m+Feeling+Lucky&q=

For DuckDuckGo, ready it to:

https://duckduckgo.com/?q=\

Secure DNS with DNSSEC validator

You tin can enable DNSSEC support for safer browsing.

Secure DNS with DNS over HTTPS

See Domain name resolution#Application-level DNS.

Adding magnet protocol association

In well-nigh:config set network.protocol-handler.expose.magnet to false. In case information technology does non exist, it needs to be created, correct click on a free expanse and select New > Boolean, input network.protocol-handler.expose.magnet and set it to faux.

The side by side time you open a magnet link, you volition exist prompted with a Launch Application dialogue. From there merely select your chosen BitTorrent client. This technique tin as well be used with other protocols: network.protocol-handler.expose.<protocol>.

Prevent accidental closing

There are different approaches to handle this:

This beliefs tin can be disabled with browser.quitShortcut.disabled property prepare to true in near:config

An alternative is to add a rule in your window manager configuration file. For example in Openbox add:

          <keybind key="C-q">    <action name="Execute">      <execute>false</execute>    </action>  </keybind>

in the <keyboard> section of your ~/.config/openbox/rc.xml file.

Note: This will exist constructive for every awarding used under a graphic server.

The Disable Ctrl-Q and Cmd-Q extension can be installed to preclude unwanted endmost of the browser.

Note: This extension no longer works on Linux due to a bug.

Jerky or choppy scrolling

Scrolling in Firefox can experience "hasty" or "choppy". A mail on MozillaZine gives settings that piece of work on Gentoo, merely reportedly work on Arch Linux as well:

Set mousewheel.min_line_scroll_amount to 40
Set general.smoothScroll and general.smoothScroll.pages to false
Prepare epitome.mem.min_discard_timeout_ms to something really large such as 2100000000 merely no more than 2140000000. Above that number Firefox will non have your entry and complain with the error code: "The text y'all entered is not a number."
Set paradigm.mem.max_decoded_image_kb to at least 512K

Now scrolling should flow smoothly.

Run Firefox inside an nspawn container

See systemd-nspawn#Run Firefox.

Disable WebRTC audio post processing

If you are using the PulseAudio PulseAudio#Microphone echo/noise counterfoil, you probably exercise non want Firefox to do boosted sound post processing.

To disable audio mail service processing, modify the value of the post-obit preferences to false:

media.getusermedia.aec_enabled (Acoustic Echo Counterfoil)
media.getusermedia.agc_enabled (Automatic Gain Control)
media.getusermedia.noise_enabled (Noise suppression)
media.getusermedia.hpf_enabled (High-pass filter)

Fido U2F authentication

Firefox supports the Fido U2F hallmark protocol. Install libfido2 for the required udev rules.

Get ALSA working dorsum

As long every bit Curvation keeps building Firefox with ac_add_options --enable-alsa, then Firefox works fine without pulse on the system, without needing any special configurations, and without apulse (unless using pulse on the system and wanting Firefox to avert using it). It used to be one had to allow ioctl syscalls, blocked by default past Firefox sandboxing, and required by ALSA setting security.sandbox.content.syscall_whitelist in almost:config, to the correct ioctl syscall number, which is xvi for x86-64 and 54 for x86-32, but not anymore. For reference, encounter:

[iv] [five]

Force-enable WebGL

On some platforms WebGL may be disabled even when the user desires to apply information technology. To forcefulness-enable WebGL set webgl.forcefulness-enabled to truthful, to besides force-enable WebGL anti-aliasing, prepare webgl.msaa-forcefulness to truthful.

If you become an error like to this:

libGL error: MESA-LOADER: failed to retrieve device information libGL error: prototype driver extension not establish libGL mistake: failed to load commuter: i915 libGL error: MESA-LOADER: failed to remember device information ...

then you lot can endeavour the solution explained in Firefox bug 1480755 [six]:

Fix security.sandbox.content.read_path_whitelist to /sys/

Enable Recommended by Pocket

If y'all do not see "Recommended by Pocket" (Preferences > Abode > Firefox Home Content - between "Top Sites" and "Highlights"), you lot tin can enable information technology by setting browser.newtabpage.action-stream.feeds.section.topstories and browser.newtabpage.activity-stream.feeds.system.topstories to true in about:config. Although the option will still not show in Preferences, newly opened tabs/windows (if set to Firefox Habitation) should now display Pocket recommendations.

Prevent the download panel from opening automatically

As of Firefox 98, the download panel (with ongoing/recent downloads) always opens whenever a download starts.

You can disable this behavior past setting the browser.download.alwaysOpenPanel preference to false in about:config.

Come across also

MozillaZine Wiki
about:config entries MozillaZine article
Firefox touch-ups that might be desired

dadeiteriabittem46.blogspot.com

Source: https://wiki.archlinux.org/title/Firefox/Tweaks