Extension resizing would be tricky from a UX standpoint, as it would make things a little bit unpredictable, but general window resizing will definitely be a thing
I'm picturing this: an extension that, for whatever program is under the cursor, tries to list all keyboard shortcuts/hotkeys.
One could then search through them or "launch" them from there. I've always wanted to build this as a fullscreen app but this could be even better.
