[wsha]

I have followed the situation fairly closely, and I agree with your assessment. I haven't seen anything that makes me think either Pentadactyl or Vimperator will survive the deprecation of XUL. The most promising vim-like addon is VimFx (followed by the Chrome addons like Vimium and cVim which maybe will work in Firefox one day as WebExtensions -- I try on Nightly every couple months but they don't work so far). The reason I say this is that it has active development and developers committed to the WebExtensions transition (plus has less features so it is easier to port). You can follow the progress here:

https://bugzilla.mozilla.org/show_bug.cgi?id=1215061 https://github.com/lydell/webextension-keyboard