I totally understand & this style of plugin is probably a bit of a monster of quirks, this might not be the top three but the ones I think are the main problems:

Using Vimium (1.67) from Chrome Store:

1) This is the top priority issue: On any page you can press 'f' and a load of link hints will appear (loads of yellow boxes with 1 or 2 letters). You type the hint letters (they are shown in caps but it doesn't matter) and it'll navigate to that link. Mostly this works however: You now type 'H' to go back to the previous page. You type 'f' again. You just get the vimium ui showning a 'Collecting Hints...' box in the bottom right of the window but no hints appear. You generally have to refresh the page to get the hints to work again (but sometimes I have to reopen a new tab to get it working again). Minor related issue; typing 'F' (i.e. cap f instead) should open the chosen link in a new tab but it doesn't.

2) Type '/' should allow searching the page. It opens a search box in the bottom right corner - it should immediately take the cursor focus and allow you to start typing what you are searching for in the current page, press Enter and you should be able to press 'n' or 'N' to show cycle through the matches. Pressing Escape whilst typing in the search box will close the search box and take you out of 'search mode'. This kind of works but quite often the search box doesn't get focus, pressing Escape whilst typing in the search box doesn't close the search box and (albeit minor) the matched text selection boxes look odd.

3) I'm not sure what's the best to choose for 3 - it's either 'o' which opens up a search bar similar to 2 but it allows you to search your history and open the link - again it doesn't get focus and stops working when you go back. Or that 'x' and 'X' should close the current tab, and reopen the last closed respectively.

kulehandluke "this is the only thing stopping me from switching "

You have no idea how many times I heard this. I only wish you guys didnt all have a different 'only thing stopping me from switching" as that would make our job easy, and not having 2000 open issues!

kulehandluke +1 on this selection of top 2 features for Vimium.

I love Orion (and Kagi search), but do miss having the f search functionality. I also really like (because it speeds up my workflow) navigating pages with vim keybindings (e.g. j for down, k for up, H for previous page, L for forward a page, gg to scroll to the top, etc...).

I recently updated to the latest Vimimum plugin (2.04) and can't seem to get it working right (on Orion 0.99.125-beta), so I've left it disabled for now and will wait. It was working for me on an older version (but I can't determine which one it was). I really appreciate all the hard and awesome work!

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.

I don't see anybody mentioning this, though shift+T doesn't seem to work properly for me. Upon pressing the key for the first time on any new page, the omnibar overlay shows up, but doesn't have focus for some reason. I have to click on it for it to get focus, or click anywhere else on the page to dismiss it (since Esc doesn't work either without it being focused). After this, further attempts at shift+T on the same page always works properly.

It seems to be the same for similar functionalities that use this overlay, e.g. shift+O.

Edit: I also tried tyirvine's version though it seems to have the same issue.