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What is the cause of Firefox seizing up and having to use task manager to close down

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When I use Firefox within 2 pages it seizes. When you try to click on anything I hear a ding with no response, even when you try to shut it down. You have to shut it down with Task manager. I have uninstalled it and reloaded but the same thing happens. When I use Explorer I have no troubles. I need Firefox as a site that I use only works with Firefox. This problem has occurred after the recent upgrade

When I use Firefox within 2 pages it seizes. When you try to click on anything I hear a ding with no response, even when you try to shut it down. You have to shut it down with Task manager. I have uninstalled it and reloaded but the same thing happens. When I use Explorer I have no troubles. I need Firefox as a site that I use only works with Firefox. This problem has occurred after the recent upgrade

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Start Firefox in Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).


Which security software (firewall, anti-virus) do you have?