When you set "System Theme" that should actually mean that all the things you set for windows should apply to this crappy browser version!

Starting in Firefox 92 89, the "System" theme switches between "Light" and "Dark" based on your system preference for light vs. dark theme. It does not pick up many (any?) custom colors from your system theme.

There is a request on Mozilla's "Ideas" site to pick up system colors in a future update: https://mozilla.crowdicity.com/post/719939

For now, you could consider using an add-on theme. If you preferred the colors of the "Default" theme from Firefox 57-88, someone created an add-on theme that emulates it. You can give it a try here:

https://addons.mozilla.org/firefox/addon/photon-colors/

If that color doesn't suit you, the Firefox Color extension lets you create your own theme:

https://addons.mozilla.org/firefox/addon/firefox-color/

This doesn't solve the problem of active and inactive windows looking exactly the same. I do appreciate the reply, tho. The "system theme" should work as it says in the theme description of it. So it is broken. Either fix it or eliminate the theme altogether.....

Thanks, SgrB2

Or rename it to Light/Dark so no one is confused about what it does?

Support forum volunteers don't program Firefox or set priorities. If you want to vote for the idea I mentioned earlier, you can register on the site: https://mozilla.crowdicity.com/post/719939

I have sent my "new" System Theme as it appears in Version 92 of the Firefox browser. It is washed out and should show a light blue bar across the top which is what I set for all my active windows. The blue bar should turn dark gray for inactive windows. Note also in the uploaded image what the description states for the system theme. Obviously, the description does not comport with the results. Whoever maintains the software should be made aware of it and fix it!

I looked at the Bugzilla process and conclude that this forum that we are trying to help each other as users is not even monitored by the Firefox Browser software developers that work for Mozilla. These guys don't even care if the features they advertise work as advertised. The Bugzilla process is so daunting that no sane casual user would ever even try to report a bug. Moreover, you have to have an additional Bugzilla account!

The Bugzilla process is so daunting that no sane casual user would ever even try to report a bug.

I didn't suggest using Bugzilla for this issue. Also, I'm sure that many of the regular non-developer users who file bugs are sane.

The term I used is "casual" and not "regular". Most people use a computer browser like an office pencil and it should be the Mozilla software folks' job to keep the pencil sharp. This problem as dragged on from version 89 (which had a temporary fix) to version 92 (which has no fix). It's about time it does get fixed without having to resort to Bugzilla -- it's a well-known issue.

Hello, is anyone, who does the care and feeding of the version 92 browser, out there?

Cheers, SgrB2

For the record, here is my version of the question, at https://support.mozilla.org/en-US/questions/1349944. (SgrB2 responded there and asked me to support the post here.)

I had the Firefox menubar/tabs set to be the same as my Win 10 system's theme color (Settings > Personalization > Colors), the same as the color of the taskbar. When Firefox v. 92.0 self-installed on Sept 7, 2020, the menubar/tabs color reverted to Firefox's default, a dull gray.

System Theme in Add-ons Manager > Themes is still enabled.

How do I get Firefox to partake of the Windows system theme again?

This has happened before when Firefox updated, although it doesn't happen EVERY time. The last time it happened, I recall being able to find a simple about:config adjustment on Google (not on this site), but I can't find it now. (As I recall, it was an about:config item that didn't sound like it would affect the menubar color, but it did.)

I have another laptop on which I rushed to disable automatic updates, so Firefox on that laptop still shows the system color. Is there a file in the Profiles folder I could copy into the problem computer that would restore the theme color setting?

Thanks.

Although I would like the simple solution of Firefox picking up system settings, a decent workaround appears to be Firefox Color, at https://color.firefox.com/. The settings for this extension are at this web address.

You have to manually set all colors. To match your system background color, use the RGB or hex settings at Windows 10 Personalization > Color setting.

To ensure a differential between Firefox as active window vs. inactive window, set "Background Color" (Custom Colors tab) to the RGB/hex of your Windows 10 Color (or whatever color you like), and set "Frame Inactive" (Advanced Colors tab) to something else.

Bless you, Watt !

Cheers, SgrB2

Bless you, Watt ! Cheers, SgrB2

Thanks. My only concern: The settings for Firefox Color are made at a website. Are they also being recorded in a .json or some such file on one's computer? If not, then at the next update, the settings might be lost and we'd have to start all over. (I don't know how any of this works.)

Well may be right but to make the changes again is trivial. I am not sure that the changes are being done at a website since you have to add Firefox Colors just like a theme extension is added. It's the Mozillians busily working behind the scenes that worry me .....

My only concern: The settings for Firefox Color are made at a website. Are they also being recorded in a .json or some such file on one's computer?

Yes, the Firefox Color extension stores its data similarly to how other extensions store their data.