Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox will no long connect me to the internet.

more options

Firefox will no longer connect me to the internet. I can connect to the internet using Internet Explorer, but not Firefox. Prior to this problem my McAffee security was giving a message that a Firefox program was trying to run but McAfee didn't recognize it. I chose to block it from running since I didn't know what it was. I have uninstalled Firefox and tried to reinstall Firefox from the download link at Mozilla.org. This did not fix the problem.

Firefox will no longer connect me to the internet. I can connect to the internet using Internet Explorer, but not Firefox. Prior to this problem my McAffee security was giving a message that a Firefox program was trying to run but McAfee didn't recognize it. I chose to block it from running since I didn't know what it was. I have uninstalled Firefox and tried to reinstall Firefox from the download link at Mozilla.org. This did not fix the problem.

All Replies (1)

more options

Unblock Firefox in the McAfee Firewall. You can find instructions for that from this page.
http://support.mozilla.com/en-US/kb/Firewalls