Firefox Compact Mode

This theme goal is to create a compact mode that follows Firefox 89 (known as Proton) design system while using the same vertical space as the compact mode in Firefox 88 (known as Photon).

Supported Platforms

I try to test my script in the platforms listed below. However, that doesn't mean it's bug free. If you find an issue, please open a bug report.

• Linux
• macOS Catalina
• Windows 10
• Window 7

Note: Currently I only tested it in Nightly but I plan to support both the Release and ESR channel in the (near) future.

Installation

1. Type about:config in the address bar and press Enter/Return.
2. Click the button accepting the risk.
3. In the search box above the list, type or paste toolkit.legacyUserProfileCustomizations.stylesheets.
4. Double-click the toolkit.legacyUserProfileCustomizations.stylesheets preference to switch the value from false to true.
5. Now, search for browser.uidensity and set it to 1.
6. Open your profile folder (See How do I find my profile?)
7. Go to chrome folder or create it if it doesn't exist
8. Copy/Paste the userChrome.css file from this repository inside the chrome folder.
9. Restart Firefox.
10. Enjoy! :)

Screenshots (Click on the image to enlarge)