VimFx (and Vimium for Chrome -- XUL deprecation and the loss of Pentadactyl migth be what finally pushes to switch from Firefox to Chromium) are nice addons but feature wise they do only a small subset of what Vimperator&#x2F;Pentadactyl do. I use Pentadactyl and I get a lot of use out of writing my own plugins, using autocommands to trigger different actions on different pages, using quickmarks, and using &quot;:js&quot; on the command line to debug javascript code.<p>I plan to use VimFx&#x2F;Vimium in the future though because those keyboard patterns are ingrained in me now. Pentadactyl development has dried up over the last few years and it seems unlikely that such a huge change as XUL deprecation will be addressed. The developers have been asked about this several times through different media and not responded. I&#x27;m not sure about Vimperator. The developers are still active but porting is a lot of work and currently all of the necessary API&#x27;s do not exist. Hopefully, I can cobble together something resembling Pentadactyl&#x2F;Vimperator by using a few other extensions in addition to VimFx&#x2F;Vimium.