Compact mode workaround in Firefox

Revision Information
  • Revision id: 283115
  • Created:
  • Creator: user19503961022152242870412723300572780461
  • Comment: only 3 steps are required to enable compact mode
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? No
  • Is current revision? No
  • Ready for localization: No
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Revision Content
Compact mode is not currently supported. For the recommended and supported experience, we encourage you to keep the normal density setting.

Starting with Firefox version 89, the compact mode density option was removed from the Customize panel but you can still activate it in the Configuration Editor (about:config page).

Warning: These instructions are for experienced Firefox users. Changing settings in the Configuration Editor (about:config) can have serious effects on your browser’s stability, security and performance.
Only proceed if you are comfortable with advanced settings and understand the potential impacts.

  1. Type about:config in the address bar and press EnterReturn.
    A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.
  2. Find the browser.uidensity preference.
  3. Change its value to 1 and then close the tab.

After changing this preference, you can switch between regular and compact mode:

  1. Click the menu button Fx89menuButton to open the menu panel.
  2. Click More tools.
  3. Choose Customize toolbar….
  4. At the bottom of the panel, click Density.
    Fx94CustomizeDensity-macFx96Density-Compact
  5. After you finish customizing Firefox, click Done.