> some of the features of the old extensions are impossible to implement in the new extension engine
I am stuck on FF 53 (and reinstalling it whenever automatic updates sneak past me) since it still has the XUL API Pentadactyl uses to receive keyboard input[0]. The new WebExtension API don't expose the same level of functionality, so it can't be simply ported to them as is.
One approach to coping with quantum is to run 2 (or more)
Firefox profiles, one for the old, or ESR, or pre-quantum
executable; and the other for Quantum:
/usr/bin/firefox53 -P esr
/usr/bin/firefox -P quantum
and if you want access to the same saved bookmarks,
just use Firefox Sync to match them up.
It won't help with Pentadactyl, but folks with other use cases may find it useful.
I am stuck on FF 53 (and reinstalling it whenever automatic updates sneak past me) since it still has the XUL API Pentadactyl uses to receive keyboard input[0]. The new WebExtension API don't expose the same level of functionality, so it can't be simply ported to them as is.
0: https://github.com/5digits/dactyl/issues/99