Recent answers to How do I speed up firefox.https://support.mozilla.org/en-US/questions/9629152013-06-24T16:27:30-07:00Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extens2013-06-24T16:27:30-07:00cor-elhttps://support.mozilla.org/en-US/questions/962915#answer-448369<p>Start Firefox in <u><a href="/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode" rel="nofollow">Safe Mode</a></u> to check if one of the extensions (Firefox/Tools &gt; Add-ons &gt; Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools &gt; Add-ons &gt; Appearance).
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<ul><li>Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.
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<ul><li><a href="https://support.mozilla.org/kb/Safe+Mode" rel="nofollow">https://support.mozilla.org/kb/Safe+Mode</a>
</li><li><a href="https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes" rel="nofollow">https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes</a>
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<p>It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
</p><p>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 internet for Firefox and the plugin-container process and the updater process.
</p><p>See:
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<ul><li><a href="https://support.mozilla.org/kb/Server+not+found" rel="nofollow">https://support.mozilla.org/kb/Server+not+found</a>
</li><li><a href="https://support.mozilla.org/kb/Firewalls" rel="nofollow">https://support.mozilla.org/kb/Firewalls</a>
</li></ul>
<ul><li><a href="https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating" rel="nofollow">https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating</a>
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