shebg626 "So far everything except moving back and forward in history seem to work, but Orion alreay has keyboard shortcuts for that."
This is my experience as well - although occasionally I've had Vimium stop working midway through a browsing session (e.g. 'f' does nothing) until the tab is reloaded.
Vimium's (capital) H and L not supporting back/foward in history (like cmd-[ and ]) is the main annoyance for me now. It feels like this should be one of the easier bugs to fix.
For what it's worth, Orion works incredibly well for me now (on desktop and iOS), so I'm sticking with it, unlike a couple of past attempts where I gave up and went back to Safari / Firefox.