Sidebery Expand With Shortcut Instead Of Hovering

[Shina-SG]

This is so that you could focus on the pinned tab without having the whole thing expand.

Currently the workaround is to find an extension that can assign titlepreface or something else from the main-window that won't effect the rest of Firefox, I remember there's some extension like that but I can't find it now, so if anyone see something like it feel free to post it here or some other workaround.