Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Cannot run 64 bit Firefox, will run in safe mode. 32 bit Firefox will run. Windows 10 version 1709.

  • 1 reply
  • 1 has this problem
  • 5 views
  • Last reply by Shadow110

jbradd
jbradd
more options

Approximately two weeks ago Firefox was operating normally. Then while I was using Outlook to do my emails clicked on a link Firefox pop the message said they were doing an update. When the update was finished and I clicked the link Firefox would not start. Little spinning circle for about three seconds that it goes away. 64 bit Firefox will run in safe mode, 32-bit Firefox will work in this version of Windows, 1709 build 16299. johnb

Approximately two weeks ago Firefox was operating normally. Then while I was using Outlook to do my emails clicked on a link Firefox pop the message said they were doing an update. When the update was finished and I clicked the link Firefox would not start. Little spinning circle for about three seconds that it goes away. 64 bit Firefox will run in safe mode, 32-bit Firefox will work in this version of Windows, 1709 build 16299. johnb

All Replies (1)

Shadow110
Shadow110
more options

Running 2 versions of Firefox is a Conflict.

uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do : https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Reinstall with Current Release Firefox 57.0 with a Full Version Installer https://www.mozilla.org/firefox/all/

Please let us know if this solved your issue or if need further assistance.