This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Can't start up Firefox.

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

more options

Firefox won't boot when I double click the browser icon on desktop. I get a flashing hourglass instead. Might have something to do with Windows 10 update. I have tried uninstalling and reinstalling the browser. I do not even get that annoying message from Microsoft asking if I really want to open up Firefox. Maybe blocked there. Any advice?

Firefox won't boot when I double click the browser icon on desktop. I get a flashing hourglass instead. Might have something to do with Windows 10 update. I have tried uninstalling and reinstalling the browser. I do not even get that annoying message from Microsoft asking if I really want to open up Firefox. Maybe blocked there. Any advice?

All Replies (1)

more options

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


Start your Computer in safe mode with network support. Then start Firefox.
Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode
Starting Any Computer In Safe Mode; Free Online Encyclopedia