Firefox - Dwyne (Dwine) Genealogy & Personal Site
🏠 Home 👪 Gen 👈 Back 👆 Top

Firefox/Thunderbird - Change Active Tab Colour

This procedure will change the colour of the active tab in Firefox(v59+) or Thunderbird(v60+)

First - Ensure that you have a theme (Dark or Light) selected. This procedure has no effect on the Default Theme!

For Firefox v69+ you need to enable userChrome.css. about:config and set "toolkit.legacyUserProfileCustomizations.stylesheets" to true

  1. Go to your
  2. Open your profile folder. (should be something.default)
  3. Using Notepad or similar editor create a file named userChrome.css

Change the rgb(220, 53, 84) colour to suit.

Quite simple. Took me quite a bit of time to figure this out.

Firefox/Thunderbird - Change App Text Size

  1. Open configuration file
  2. Search:Pix
  3. layout.css.devPixelsPerPx
  4. Modify value - Try 1.12 or 1.25 - be careful

🏠 Home 👪 Gen 👈 Back 👆 Top