A bug has been reported regarding this: "I changed browser.tabs.tabMinWidth to something larger than 100 and opened enough tabs so that the width of browser.tabs.tabMinWidth was reached, played audio from one of the tabs

Actual results: the tab with audio playing icon shrunk...

Expected results: browser.tabs.tabMinWidth should have been adhered to."

Hello

Take a look at https://www.reddit.com/r/FirefoxCSS/comments/1j4f0hs/how_to_stop_this_new_tabshrink_animation_when_a If you wish to test userChrome.css /* prevent audio playing tabs from modifying tab width */

https://www.userchrome.org/how-create-userchrome-css.html

Other topics have been created about this. I hope it will be fixed soon!

https://bugzilla.mozilla.org/show_bug.cgi?id=1952080 https://techissuestoday.com/firefox-v136-mute-tab-change-driving-you-nuts-heres-how-to-revert-it/

Hello Take a look at https://www.reddit.com/r/FirefoxCSS/comments/1j4f0hs/how_to_stop_this_new_tabshrink_animation_when_a If you wish to test userChrome.css /* prevent audio playing tabs from modifying tab width */ https://www.userchrome.org/how-create-userchrome-css.html

I had tested a similar code without effect but this one seems to workaround the bug. Thanks!

I hope it will be resolved quickly, that we don't have to tinker ourselves! ^^

You need to also post what site is causing this as well as what userChrome.css your using and if css edit you should post that to the site where you got the userChrome.css to address the css issues.

This will be fixed in Firefox 137, scheduled to release April 1, 2025. (per bug 1945993)

I'm not aware of a convenient workaround in the meantime. (userChrome.css isn't convenient in my opinion.)

It workaround the bug, but I'm waiting the update to delete it...

Thanks, jscher2000

Seems to be fixed since 137

Hello

https://connect.mozilla.org/t5/discussions/stop-changing-the-size-of-the-tab-when-audio-plays/m-p/92206/highlight/true#M35838 i also noticed that's resolved with Firefox 137.0