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

Firefox "hangs" (freezes)

  • 1 cavab
  • 1 has this problem
  • 5 views
  • Last reply by FredMcD

more options

In the past week or so, Firefox has unexpectedly "frozen" and does not respond. I have not loaded any new programs during this period. The only way I can get Firefox to run is to end all the Firefox processes in Task Manager and restart it. I also noticed that there are usually 9 firefox processes running in Task Manager.

In the past week or so, Firefox has unexpectedly "frozen" and does not respond. I have not loaded any new programs during this period. The only way I can get Firefox to run is to end all the Firefox processes in Task Manager and restart it. I also noticed that there are usually 9 firefox processes running in Task Manager.

All Replies (1)

more options

More than one process is normal for the current Firefox. http://www.ghacks.net/2016/07/22/multi-process-firefox/

Multi-process Firefox is codenamed "e10s". https://wiki.mozilla.org/Firefox/multiprocess


Start Firefox using Troubleshoot(Safe) Mode {web link}

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


https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding