Not sure why, but for some reason I can't upload any screenshots, so I'll just link to them!

https://postimg.cc/CZvhXdP2

https://postimg.cc/34d8T7zx

Try downloading Firefox from Mozilla, run it from the folder and see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

You are not the only user to have such an issue. You could try changing themes. Cross fingers, I haven't had the problem. Do you use a dark theme on your system? That may be the source of the problem.

Yeah, I was having dark issue with Nightly and had to change the theme.

You are not the only user to have such an issue. You could try changing themes. Cross fingers, I haven't had the problem. Do you use a dark theme on your system? That may be the source of the problem.

I use a light-theme on my desktop. Changing firefox-themes tecnically does "Fix" the problem, if I use a theme that only has black coloured fonts. The moment the font is white (or light x-colour) it reverts black to dark-mode.

I have made my own third-party theme that (to the best of my ability) works around the issue. Notice how my Notice how my Selected Tab has a dark font, my not-selected tab on the other hand has a white font. As long as the selected tab is dark/black the browser wont revert to dark-mode.

How ever locking me out from using Most third-party themes for Firefox is not a reliable fix in my opinion, I would love to keep using all the amazing third-party themes that are still avalible for the browser and that (besides for this specific issue) works great!

Try downloading Firefox from Mozilla, run it from the folder and see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

I gave it a try and I still have the same issue :(

You also mentioned I could try to change my theme and I have made my own third-party theme that (to the best of my ability) works around the issue. Notice how my Selected Tab has a dark font, my not-selected tab on the other hand has a white font. As long as the selected tab is dark/black the browser wont revert to dark-mode. I do find it to be a major bummer thou that I can't use most of the great third-party themes still avalible for Firefox and that until (I think) version 96 worked perfectly fine but since then force dark mode.

@Mumrik, you may be able to fix your issue with a preference in about:config. The subject was reviewed comprehensively in the answer linked below.

Change "layout.css.prefers-color-scheme.content-override" in 'about:config' to: Dark (0), light (1), system (2) or browser (3). https://support.mozilla.org/en-US/kb/about-config-editor-firefox https://support.mozilla.org/en-US/questions/1364418#answer-1474290