[cycomanic]

Regarding pentadactyl, I'm using tridactyl on Firefox and essentially for all my use cases it behaves the same as pentadactyl. I realise that some of the advanced functionality of pentadactyl is not available (IIRC pentadactyl allowed you to essentially reprogram the browser), but I have to say I'm not really missing much.

[bovine3dom]

For what it's worth, manifest V3 could effect Tridactyl as it could block code that is evaluated at runtime from accessing the browser APIs.

It will make it less programmable by the end user.

[Fnoord]

There's also Vimium for Firefox called vimium-ff. I don't know which one's better, I just use vimium-ff.