Nice idea but... a problem Noté 1 sur 5 étoiles
I get multiple "Flagtab Options" menu items when I right-click on a tab. The number of these "Flagtab Options" increases every time I right-click, so it soon becomes unmanageable.
Initially there is one occurrence, and I got it up to about 12 before I uninstalled the extension.
I have about 100 extensions loaded, so can't determine (and can't be bothered to find out) which one it interferes with (or interferes with it?)
You may try checking your extension against "Tree Style Tabs" by Shimoda Hiroshi.