I've used Vimium on Chrome. Every few years I get excited, install it, feel 10x more productive, and then a few days later uninstall it.
As I recall, it doesn't work on the New Tab page. It doesn't work if the address bar is in focus. I believe you have to wait for the page to fully load before you can use it.
Most annoyingly, a lot of websites have custom keyboard shortcuts, so you have to blacklist them in the Vimium config. Eg Gmail, Miro. Then you need to remember you can't use Vimium on them.
None of this is their fault in any way, of course. But it does make Vimium a bit annoying to use for me anyway.