1767803 - Weird shadow behind texts on tabs

Status: RESOLVED DUPLICATE of bug 1767175

(Firefox :: Tabbed Browser, defect)

Description

[n2jeam]

Attachment: Screenshot 2022-05-04 093508.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0

Steps to reproduce:

It happens only on the theme I'm currently using (Little Flowers) but none of the default themes

Actual results:

There's wield white shadow behind the texts on the tabs. They change slightly when the mouse is over different tabs. And it seems that the shadow is incorrectly rendered from tab texts (they have the shape of texts)

Expected results:

Render the texts correctly on tabs

Comment 1

[n2jeam]

It happened after FireFox was upgraded to the latest developer version 101.0b2

Comment 2

[eonsago703]

Attachment: TabShadows.png

Can confirm this as well. The text shadowing on tabs is happening for me after updating to 101.0b2.

Comment 3

[eonsago703]

The shadowing appears to be theme-based on whether it shows or not. Some themes are showing the shadowing effect, like Gradient Blue, while some aren't like the default themes or Matte Black for example.

Comment 4

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

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

Comment 5

[Alice0775 White]

This seems to be duplication of Bug 1767175

Comment 6

[eonsago703]

Appears to be similar, if not the same, but it's strange that it is only happening on some themes.

The issue is not present on Firefox Alpenglow, Dark, and Light for example.