Firefox will Freeze Sometimes
9/19/2026 Firefox Version 156.0 (64-bit) for windows 11 up to date with Windows Updates. I often have 2,3,4 Firefox windows open, each with several tabs open. Sometimes, Firefox will just totally freeze, and I can't do anything more. ALL Firefox open windows and tabs freeze. Other windows/apps are fine, and working normally. Only Firefox seems to be affected. The only thing I can do is use Windows to totally close/end the Firefox application. It then closes all the Firefox windows. I can then reopen Firefox, and everything seems fine - but I have totally lost the open windows and tabs I was on.
This has happened across several Firefox updates. I do not think this happened prior to 2026. Maybe just since June 2026.
One Extension - Web Threat Shield
Thanks!
All Replies (3)
Hello,
First, you can try disabling the extension, to see if its checking scripts conflict with the browser.
next, try goung to menu>settings. In the general panel, scroll down to the performance section, uncheck use recommended performance settings and uncheck "Use hardware acceleration when available". Lastly, Restart Firefox.
If you don't want to lose your tabs after a possible crash at any time, then go to Settings > General, then under the startup section, check the box next to Open previous windows and tabs.
Thanks dessertdish.
I will try what you suggested. However, since it only happens once in a while, it may be a while until I am sure of a result.
Thanks Again!
Also, Extension - Web Threat Shield is not in use. It is telling me that it "Needs New Permissions". But it still could be some sort of issue.
You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.