1724877 - Unreadable tab bar (dark on dark) in Firefox 90.0.2

Status: RESOLVED DUPLICATE of bug 1722886

(Core :: Widget: Gtk, defect, P2)

Description

[Cimbali]

Attachment: 2 bugzilla tabs in the tab bar: currenty open (left) is readable, the other has black text on black background

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:90.0) Gecko/20100101 Firefox/90.0

Steps to reproduce:

• Updated to Firefox 90.0.2
• Running Linux with a dark system theme (Gtk Breeze Dark)
• Wanting page content to be rendered as white, so config ui.systemUsesDarkTheme set to 0
• Using “System” Firefox theme

Actual results:

tab bar is unreadable (dark text on dark background) except for the current tab. Only favicons of other tabs are visible.

Expected results:

Non-current tabs should either use both system font and background colors (preferred I suppose), or define both colors (as with complete themes, but would blend in less to the system theming).

Currently the “System” theme seems to define a font color and inherit the background color, which causes the clash.

This seems to be different from 1714896 which happened in 89 pre-relooking and from 1720441 which should be fixed in 90.0.2 and is about white-on-white.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Theme' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Timea Cernea [:tbabos][inactive]]

Thank you for this report!
Moving it over to its component so developers can check it out. There have been a great amount of GTK Theme bugs like this fixed recently.

Comment 3

[Martin Stránský [:stransky] (ni? me) (PTO, back on Feb 17)]

Can you test latest nightly please?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems?rd=Bug_info_Firefox#Testing_Mozilla_binaries
Thanks.

Comment 4

[Cimbali]

Downloaded today’s nightly, same issue with new profile and just ui.systemUsesDarkTheme=0, see https://i.imgur.com/cbGvOVw.png for a screenshot.

Comment 5

[Martin Stránský [:stransky] (ni? me) (PTO, back on Feb 17)]

Emilio, any idea here?
Thanks.

Comment 6

[Emilio Cobos Álvarez (:emilio)]

This is basically bug 1722886. I'll try to think about what the best solution is there...