Respostas mais recentes para When I start Firefox, no website will open. It states it is unavailable. Internet explorer works at the web sites. I have deleted and reloaded Mozilla and it did not help.https://support.mozilla.org/pt-PT/questions/8791832011-09-26T18:22:47-07:00You're welcome
2011-09-26T18:22:47-07:00cor-elhttps://support.mozilla.org/pt-PT/questions/879183#answer-251881<p>You're welcome
</p>Thank you. McAfee had it blocked. I unblocked it and it now opens.
2011-09-26T14:56:57-07:00djtddshttps://support.mozilla.org/pt-PT/questions/879183#answer-251853<p>Thank you. McAfee had it blocked. I unblocked it and it now opens.
</p>A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-cont2011-09-26T05:45:15-07:00cor-elhttps://support.mozilla.org/pt-PT/questions/879183#answer-251706<p>A possible cause is security software (firewall) that 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 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:
</p>
<ul><li><a href="https://support.mozilla.com/kb/Server+not+found" rel="nofollow">https://support.mozilla.com/kb/Server+not+found</a>
</li><li><a href="https://support.mozilla.com/kb/Firewalls" rel="nofollow">https://support.mozilla.com/kb/Firewalls</a>
</li></ul>