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Firefox will not load any pages after refresh and completely reinstalling

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I have been using Firefox for years with no problem on a 64 bit Windows 7 machine, i7 processor, 32 gigs of ram. Firefox is version 103 64 bit. I have Kaspersky Internet Security and Malwarebytes installed and have been using them with Firefox for years.

A few days ago Firefox just stopped loading any pages. If I go to a secure site (https) I get "secure connection failed". If I go to a non-secure site (http) I get "The connection was reset". Microsoft Edge and Google Chrome work on this machine with no problem. Oddly enough Mozilla Thunderbird also stopped working today. Only Mozilla products seem to be having problems.

Firefox works fine on other Windows 7 computers in my household.

I tried clearing the cache. I tried disabling extensions. I tried running it in Troubleshoot mode. I tried the "Refresh Firefox" option. I tried completely uninstalling and reinstalling Firefox.

None of these worked. Even a clean virgin install will not load any pages. It seems to be something specific to this machine that's preventing Firefox from working. What can I do to get Firefox working again?

I have been using Firefox for years with no problem on a 64 bit Windows 7 machine, i7 processor, 32 gigs of ram. Firefox is version 103 64 bit. I have Kaspersky Internet Security and Malwarebytes installed and have been using them with Firefox for years. A few days ago Firefox just stopped loading any pages. If I go to a secure site (https) I get "secure connection failed". If I go to a non-secure site (http) I get "The connection was reset". Microsoft Edge and Google Chrome work on this machine with no problem. Oddly enough Mozilla Thunderbird also stopped working today. Only Mozilla products seem to be having problems. Firefox works fine on other Windows 7 computers in my household. I tried clearing the cache. I tried disabling extensions. I tried running it in Troubleshoot mode. I tried the "Refresh Firefox" option. I tried completely uninstalling and reinstalling Firefox. None of these worked. Even a clean virgin install will not load any pages. It seems to be something specific to this machine that's preventing Firefox from working. What can I do to get Firefox working again?

Réiteach roghnaithe

For anyone who finds this in the future, the culprit was Kaspersky. When I disabled and then rebooted both Firefox and Thunderbird worked. I uninstalled Kaspersky and have had no problems since. I will be using a different antivirus application from now on.

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I also tried deleting and reimporting the security certificate from Kaspersky.

Even if I disable Kaspersky, Firefox still will not load any pages.

Any ideas?

Helpful?

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Anybody?

Helpful?

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Réiteach Roghnaithe

For anyone who finds this in the future, the culprit was Kaspersky. When I disabled and then rebooted both Firefox and Thunderbird worked. I uninstalled Kaspersky and have had no problems since. I will be using a different antivirus application from now on.

Helpful?

Cuir ceist

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