Vertical tabs bar keep expanded when the mouse leave the screen.

[hunganh100494]

Hi,

I think there is a problem with the vertical tabs bar behavior. I have 2 monitors, the Firefox browser is maximized in the secondary monitor in the right of the main monitor. When I move the cursor to the left to the main monitor, the cursor came across the vertical tabs and make it expanded. But when the mouse leave the screen completely and went to the main monitor, the vertical tabs bar keep showing expanded and cover the content in the browser. I think this is a bug related to the position of the cursor in the screens. But I'm helpless because I don't know how to fix it.

[trentthebaker]

Also having this issue. I'm on a fresh install of Linux Fedora KDE Plasma, happens consistently when Firefox window is maximized, inconsistently while in a smaller window. On Windows 11 I didn't notice this issue as much but it may have also been around.

Overall I really like that Firefox has official vertical tabs support now, but the implementation feels like it's lagging way behind Edge and the previous community-made solutions