Bugzilla

(In reply to Richard Marti (:Paenglab) from comment #9)
> I can reproduce this too on Mint with 78 and also on Ubuntu with 89.
> 
> I think the dark/light theme detections does something weird. When starting with the dark theme it shows the prefs, editor etc. correctly in dark. But when switching to dark theme and then back to default it detects a light theme, which is wrong with the "Adwaita-dark" theme, and switches to the light theme for prefs etc. After restart of TB it uses the correct dark in-content theme.

I can reproduce with 78.12.0 using the Adwaita-dark theme when switching from the TB dark theme to the default.

Using 91.0b1, the switch briefly flashes white, then returns to the proper default theme.

Switching from the TB light theme, back to the TB default theme, remains light for me with 91.0b1.

(In reply to Richard Marti (:Paenglab) from comment #9)
> I can reproduce this too on Mint with 78 and also on Ubuntu with 89.
> 
> I think the dark/light theme detections does something weird. When starting with the dark theme it shows the prefs, editor etc. correctly in dark. But when switching to dark theme and then back to default it detects a light theme, which is wrong with the "Adwaita-dark" theme, and switches to the light theme for prefs etc. After restart of TB it uses the correct dark in-content theme.

I can reproduce with 78.12.0 using the Adwaita-dark theme when switching from the TB dark theme to the default.

Using 91.0b1, the switch briefly flashes white, then returns to the proper default theme.

Switching from the TB light theme, back to the TB default theme, remains light for me with 91.0b1.

Edit: A restart fixes it.