Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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.

firefox not launching in windows 10

  • 1 reply
  • 1 has this problem
  • 10 views
  • Last reply by FredMcD

mistamrd
mistamrd
more options

I upgraded Windows 10 and suddenly firefox stopped launching. I deleted Firefox and reinstalled it after rebooting, and it still will not launch. I am using AVG Free as my antivirus, not avast which I have heard can cause problems with firefox.

I upgraded Windows 10 and suddenly firefox stopped launching. I deleted Firefox and reinstalled it after rebooting, and it still will not launch. I am using AVG Free as my antivirus, not avast which I have heard can cause problems with firefox.

All Replies (1)

FredMcD
FredMcD
more options

Does the Firefoc icon show up in the computer task bar?

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. Is the problem still there?

Start your Computer in safe mode with networking. Then start Firefox. Try Safe web sites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia