Firefox/Thunderbird - Change Active Tab
Colour
This procedure will change the colour of the active tab in Firefox(v59+) or
Thunderbird(v60+). The procedure is essentially the same for both Firefox and
Thunderbird.
Make sure that your "file explorer" is configured to show "hidden folders".
(top menu, file, view, select "Hidden items on the right)
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
- Go to your
- (For Firefox) C:\Users\ your user name
\AppData\Roaming\Mozilla\Firefox\Profiles\ DIRectory
- (For Thunderbird) C:\Users\ your user name
\AppData\Roaming\Thunderbird\Profiles\ DIRectory
- Open your profile folder. If there is more than one profile use the one with
the latest date.(should be something.default or default-release ie
fhty6gbo.default.release)
- Look for a folder named chrome - if it does not exist create it
- Open the chrome folder
- Using Notepad or similar editor create a file named userChrome.css
- Add cut/paste the following lines of text to userChrome.css
Note: Leave the @namespace line as is. Required for correct operation.
- @namespace
"https://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
- .tab-background[selected],
- .tab-background[multiselected="true"] {
- background: rgb(220, 53, 84) !important;} /* this sets the color of
the tab background */
- Save userChrome.css to your Firefox profile folder
- Close and reopen Firefox. Your active tab should be red.
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
- Open configuration file
- Firefox - in address bar enter about:config
- Thunderbird - Tools/Options/Advanced/Config Editor
- Search:Pix
- layout.css.devPixelsPerPx
- Modify value - Try 1.12 or 1.25 - be careful
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