Generally we're much more happy to add features. Vimium cares much more about looks and stability (although we do have a Vimium-style theme with `colours shydactyl`).

Yes, but it's still annoying to set up the containers and set up that certain sites only open in certain containers.

Also if I'm on a work device I may not want to sign into Firefox Sync for privacy reasons.

I will tell you what 3-fin can and can't do-

Can:

Js, key bindings, can show alpha and numeric hints. In numeric mode, behaves like vimp- type char of link text. ;; for link info. ; for hover. C-d/C-f et al work. H, L navigate history. Edit in vim. C-i

Cannot: Self limitation -

No way to stop page load I think. Very painful :)

No shortcut for search. No readline bindings in text editing regions.

Webext limitation- takes a while to load.

That's all I use right now.