Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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 44.0 crashes whole machine (Win 7). Screen locks up and looks pixellated (no BSOD).

  • 6 replies
  • 1 has this problem
  • 7 views
  • Last reply by cor-el

more options

Firefox 44.0 crashes whole machine (Win 7). Screen locks up and looks pixellated (no BSOD). No crash reports. Reinstalled Firefox, still crashes. Just started recently. I noticed some translucent squares around tabs recently that I had never seen before.(may be irrelevant)

Firefox 44.0 crashes whole machine (Win 7). Screen locks up and looks pixellated (no BSOD). No crash reports. Reinstalled Firefox, still crashes. Just started recently. I noticed some translucent squares around tabs recently that I had never seen before.(may be irrelevant)

All Replies (6)

more options

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

more options

I started Firefox in safe mode and have not had a crash. This is a temporary workaround, but doesn't solve the problem. How can I isolate what actually causes it since I don't want to operate only in safe mode?

more options

It could be the work of one of your add-ons. Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac=<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is detective.

more options

Thanks for your kind support. I spoke too soon. Before I had a chance to follow your recent advice, Firefox crashed the system while in safe mode. Not sure what to do now.

more options

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

more options

You can try to disable hardware acceleration in Firefox.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.