July 12 2017 Windows Update Killed Firefox. How I got FF to work.

I woke up to an update from Windows on July 12th, 2017. It happened in the background while working and it restarted by itself. I usually let these happen, so no big deal. When it restarted, I was in an endless loop of firefox crashing. Uninstalled, reinstalled, lost all bookmarks, etc. Very frustrated.

I was only able to get firefox working by going back 2 major versions (52). Here’s how:

  1. Went to FF older versions page: https://support.mozilla.org/en-US/kb/install-older-version-of-firefox
  2. Chose the older versions directory: https://ftp.mozilla.org/pub/firefox/releases/
  3. Went to 52 directory: https://ftp.mozilla.org/pub/firefox/releases/52.0.2/
  4. Then choose the OS (Win64 in my case) and then your language. Then downloaded exe.
  5. Uninstalled FF
  6. Installed downloaded 52 version
  7. UNCHECKED install maintenance part (so it wouldn’t auto upgrade the browser)
  8. Crashed on startup and asked about going into safe mode. Chose safe mode. (This actually crashed in newer versions as well.) This time, it stayed open.
  9. Closed safe mode.
  10. Opened browser as usual. Worked!
  11. Did some browsing to check, then wrote this article.
  12. Tested updating to newest FF (update history showed it had been updated, but the version was 52.)
  13. Press the ALT key to show menu at the top of the screen. HELP | ABOUT FIREFOX
  14. Click the update button. Finished. Asked to restart FF. Restarted and still works.
  15. Back to FF 54