Firefox 26/27 under Mint16 has got me considering going back to Ubuntu
FWIW, I've used FF versions up to v30 with Mint 16, and no problems with hanging or crashing.
However, I do have problems with some of the design changes they've made on purpose, so I use FF v21.
(I see only trivial - but sometimes annoying - differences between the versions; v30 has ugly space-wasting tabs, v>24 or so has bad "seach in page" behavior, the official current version says all my add-ons are disabled, but they're working...)
Install any version you want from here:https://ftp.mozilla.org/pub/mozilla.org ... /releases/
Just extract the archive into /usr/lib/firefox, or /opt/firefox. Much easier than reinstalling an OS.