2020788 - Not enough high color contrast of the active tab background to the inactive tabs background on Linux with KDE

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect)

Description

[794632548]

Attachment: Screenshot_20260303_201527.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:148.0) Gecko/20100101 Firefox/148.0

Steps to reproduce:

On Linux with KDE desktop environment I can open System settings app and on the main page "Quick settings" set Breeze Dark (theme) or Twilight.

When I launch Firefox (148.0) with lets say 20 tabs open, the active tab has not enough high color contrast of its background comparing to inactive tabs backgrounds, which avoids quickly realizing where to aim the mouse to close the tab active tab. I can imagine that people with sight issue would have significant problem with this. I do not have any issue and sometimes it takes me couple seconds to find it, regular light mode is OK. In earlier versions the contrast has been much better.

Expected results:

Please increase active tab background contrast significantly. It can also hardly compete with colorful tab groups.

Comment 1

[794632548]

Attachment: light theme, Breeze Twilight

Comment 2

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.