I settled with Surfingkeys after I tried Vimium, Vimium C, Pentadactyl and Vimperator.

Here's my Surfingkeys configuration as an ex-Vimium user:

  map('F', 'gf');
  Hints.characters = "asdgqwertzxcvb";

It makes open in new tab behave like Vimium and f work like a toggle.

Hope this helps someone looking for a better option migrating from Vimium.

[0] https://github.com/brookhong/Surfingkeys