When you filed this bug, it was under Firefox 54 (54.0+build3-0ubuntu0.16.10.1) Not sure how you got this old version but to reinstall:
> sudo apt remove --purge firefox > sudo apt update > sudo apt install firefox Then please attempt to launch it from the command line (Open terminal with CTRL+ALT+T then type "firefox") and provide any feedback. ** Changed in: firefox (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734138 Title: firefox quantum not loading To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1734138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs