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Why has my firefox stopped working since Thursday afternoon 10-15-15?

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Firefox has worked fine & now all of a sudden, it's stopped working. My Internet Explorer works, but I hate using it. Why & what do I do? Please help.

Firefox has worked fine & now all of a sudden, it's stopped working. My Internet Explorer works, but I hate using it. Why & what do I do? Please help.

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It is possible that your firewall or other security software blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:

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Chosen Solution

It is possible that your firewall or other security software blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:

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I solved the problem by restarting my computer. I should have thought of that sooner. Duh!