Firefox GNOME theme

A Firefox GNOME Pop!_OS! theme

Active tab.

Inactive tab.

This theme follows lastest GNOME Pop!_OS style.

Description

This is a bunch of CSS code to make Firefox look closer to GNOME's Pop!_OS! native apps.

This theme is supposed to work with current supported Firefox releases:

• Firefox 85
• Firefox 78 ESR
• Firefox 86 Beta
• Firefox 87 Nightly

Installation

1 - Download the files and extract them

2 - search about:profile on your browser URL bar 3 - find out which profile is being used on firefox and the copy or open the root folder

4 - if it doesn't exist create a folder called chrome inside of the firefox root folder 5 - Put those tree files on the root folder

'' 6 - search about:config on your browser URL bar and then set toolkit.legacyUserProfileCustomizations.stylesheets to true (default is false)

7 - restart firefox or open if it's closed

Scrollbars

To achieve Firefox with overlay scrollbars install firefox-gnome-scrollbars.

Enabling optional features

Optional features can be enabled by creating new boolean preferences in about:config.

1. Go to the about:config page
2. Type the key of the feature you want to enable
3. Set it as a boolean and click on the add button
4. Restart Firefox

Features

• Hide single tab gnomeTheme.hideSingleTab

  Hide the tab bar when only one tab is open.

  Note: You should move the new tab button somewhere else for this to work, because by default it is on the tab bar too. See #54.

• Normal width tabs gnomeTheme.normalWidthTabs

  Use normal width tabs as default Firefox.

• Active tab contrast gnomeTheme.activeTabContrast

  Add more contrast to the active tab.

• System icons gnomeTheme.systemIcons

  Use system theme icons instead of Adwaita icons included by theme.

  Note: This feature has a known color bug.

• Symbolic tab icons gnomeTheme.symbolicTabIcons

  Make all tab icons look kinda like symbolic icons.

• Drag window from headerbar buttons gnomeTheme.dragWindowHeaderbarButtons

  Allow draging the window from headerbar buttons.

  Note: This feature is BUGGED. It can activate the button with unpleasant behavior.

Known bugs

CSD have sharp corners

See upstream bug.

Wayland fix:

1. Go to the about:config page
2. Search for the layers.acceleration.force-enabled preference and set it to true.
3. Now restart Firefox, and it should look good!

X11 fix:

1. Go to the about:config page
2. Type mozilla.widget.use-argb-visuals
3. Set it as a boolean and click on the add button
4. Now restart Firefox, and it should look good!

Icons color broken with System icons

Icons might appear black where they should be white on some systems. I have no idea why, but you can adjust them directly in the system-icons.css file, look for --gnome-icons-hack-filter & --gnome-window-icons-hack-filter vars and play with css filters.

Development

If you wanna mess around the styles and change something, you might find these things useful.

To use the Inspector to debug the UI, open the developer tools (F12) on any page, go to options, check both of those:

• Enable browser chrome and add-on debugging toolboxes
• Enable remote debugging

Now you can close those tools and press Ctrl+Alt+Shift+I to Inspect the browser UI.

Also you can inspect any GTK3 application, for example type this into a terminal and it will run Epiphany with the GTK Inspector, so you can check the CSS styles of its elements too.

GTK_DEBUG=interactive epiphany

Feel free to use any parts of my code to develop your own themes, I don't force any specific license on your code.

Credits

Developed by Rafael Mardojai CM and contributors. Based on Sai Kurogetsu original work.

Donate

If you want to support development, consider donating via PayPal. Also consider donating upstream, Firefox & GNOME.