I am using Vimium-FF and I don't experience any issues. What are the issues you encountered ?
There was a problem with the find command '/' [0] I had for months, so I switched to Vimium C as someone pointed out in that thread it was fixed on C already and had other features. I now see that issue was finally fixed last month.
Reading the updated thread now, I see it turned political, and I guess maybe that's why I was downvoted for linking to Vimium C.
Re:Vieb – Vim Inspired Electron Browser
by rasfincher on Monday August 16, 2021 @10:48AM
(#28198768)
Same reason I switched to Vimium-C.
[0]: https://github.com/gdh1995/vimium-c