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Firefox inactive tabs

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How can I increase the color contrast between the active tab and other inactive tabs, see attachment. Themes in Extensions and Themes doesn't appear to change active/inactive tab colors after today's, 6/2/2021, download.

How can I increase the color contrast between the active tab and other inactive tabs, see attachment. Themes in Extensions and Themes doesn't appear to change active/inactive tab colors after today's, 6/2/2021, download.
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YES THIS EXACTLY! Same for waterfox default UI it is VERY STRANGE NO OPTIONS to change that why inactive tabs get GREYED OUT AND SPONTANEOUSLY all the color back if cursor goes to title bar WHAT is going on with that madness, NEEDS UI CHANGE OPTIONS TO FIX THAT FREAKING MAD NESS PLEASE AND THANK!!

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You can use code in userChrome.css to override changes in Firefox 89+ with the new Proton design.


You can look at this extension for colors in the user interface.

You can also create your own theme: