Firefox preview already has a dark theme. Does setting Firefox to use its dark theme fix the problem?

No. Both, light and dark mode, have the same issue when force-dark is enabled. I was already using the dark theme from Firefox.

Here's a screenshot on light theme. Is quite the same, but the icons of the notification bar get dark and is worse to read.

Hi

I recommend using the dark theme and the dark reader add-on available in the Firefox Preview menu. Some add-ons and features may not work on this site.

Thanks. I was using both dark theme in Android and Dark Reader extension. I found a workaround that is an app called Darq, that I can choose what apps I want to force dark mode, so I can disable to Firefox preview. The down side is that i have to give permissions through adb or root Android to use it. For adb permissions, there are some circumstances that these permissions are lost (when reboot for example).

After the update 5.2.0 (Build #21701706) i tested again with force dark mode and it didn't happen again.

--- this part is not related to the opened issue --- This update came with some features that i liked (thanks developers): - The opened tabs section has better design - when the back button is pressed in opened tabs it returns to last opened tab instead of exiting Firefox - the tab becomes full screen when the page is scrolled down - and of course I'm not having the force dark mode issue anymore