The message that appears "An Extension Twitter Container Requires Container Tabs" is not displayed correctly in dark mode.
This message should be themed nicely.
:yoasif, if you think that's a regression, then could you try to find a regression range in using for example mozregression?
:calixte I think it is related to https://bugzilla.mozilla.org/show_bug.cgi?id=1519548
Pushed by firstname.lastname@example.org:
Fix more background colors and icon fill colors for about:preferences dark mode r=dao
Confirmed issue with 68.0a1 (2019-04-21) (64-bit).
Verified fix with 68.0.1 69.0b7 on Windows 10, macOS 10.14 in junction with bug 1553385.
Bugbug thinks this bug is a regression, but please revert this change in case of error.