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.

Avatar for Username

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

I am not able to connect to internet using Firefox. I have Un-installed and reinstalled Firefox again, but still get the "Cannot find server" message. For now I'm using Internet Explorer but I would like to go back to using Firefox. Thanks.

  • 1 (رد واحد)
  • 1 has this problem
  • 1 view
  • آخر ردّ كتبه cor-el

fflover99
fflover99
more options

I lost connectivity to internet thru Firefox a while ago. Contacted my ISP and we tried many things before discovering it was a Firefox issue, not a modem or router or browser issue. Even after uninstalling/einstalling Firefox fresh, I still cannot connect to internet and get the "Unable to connect- Firefox can't establish a connection to the server at www.yahoo.com" message.

I lost connectivity to internet thru Firefox a while ago. Contacted my ISP and we tried many things before discovering it was a Firefox issue, not a modem or router or browser issue. Even after uninstalling/einstalling Firefox fresh, I still cannot connect to internet and get the "Unable to connect- Firefox can't establish a connection to the server at www.yahoo.com" message.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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.

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.

See: