Vertical Tabs - Option to flip X button left/right

[afred]

When using vertical tabs with the sidebar on the right side of the screen, with expand-on-hover, the X (close tab) button will always be where the mouse is hovered when the sidebar expands. This leads to accidentally closing tabs.

Solution: add option to flip the 'X' button so it is left-aligned in the tab instead of right-aligned.

While i'm not sure this is the perfect way to solve this, it seems at least trivially easy to implement, and should fix this issue entirely.

[Jon]

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[Agentvirtuel]

Hello

https://connect.mozilla.org/t5/discussions/sidebar-and-vertical-tabs-launch-in-release-136/m-p/98306... If you wish to test userChrome.css