1953605 - Tab width gets very small on media playback

Status: RESOLVED DUPLICATE of bug 1945993

(Firefox :: Untriaged, defect)

Description

[quadronom]

Attachment: smalltab.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:136.0) Gecko/20100101 Firefox/136.0

Steps to reproduce:

Starting in 136 (or 135?) when a media element is playing in a tab the sound icon will be placed next to the favicon (not on the favicon anymore, thanks!).
However also the tab is getting very small in its width – see picture.
As soon the playback is stopped the width bounces back to its original width.
I think this is highly irritating and also illogical.

Comment 1

[jscher2000]

This regression will be fixed in Firefox 137 per bug 1945993.

Until then, you can use a custom style rule (applied through a userChrome.css file) as a workaround to override the built-in rules for tab width. That's beyond the scope of Bugzilla comments, but you can take a look at the following:

• Code: https://www.reddit.com/r/FirefoxCSS/comments/1j4f0hs/how_to_stop_this_new_tabshrink_animation_when_a/
• General background: https://www.userchrome.org/how-create-userchrome-css.html