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.

Buscar en Ayuda

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 is configured to use a proxy server that can’t be found. how do i change this on my macbook ?

more options

Firefox is configured to use a proxy server that can’t be foundCheck the proxy settings to make sure that they are correct. Check to make sure your computer has a working network connection. If your computer or network is protected by a firewall or proxy, make sure that Tor Browser is permitted to access the Web.

Firefox is configured to use a proxy server that can’t be foundCheck the proxy settings to make sure that they are correct. Check to make sure your computer has a working network connection. If your computer or network is protected by a firewall or proxy, make sure that Tor Browser is permitted to access the Web.

Todas las respuestas (1)

more options

Here is where you check your Firefox connection settings:

  • Mac: "3-bar" menu button (or Firefox menu) > Preferences
  • Windows: "3-bar" menu button (or Tools menu) > Options
  • Linux: "3-bar" menu button (or Edit menu) > Preferences
  • Any system: type or paste about:preferences into the address bar and press Enter/Return to load it

Firefox 56-59: In the search box at the top of the page on the right side, type proxy and Firefox should filter to the "Settings" button, which you can click.

Firefox 38-55: In the left column, click Advanced. Then on the right side, with the "Network" mini-tab active, click the "Settings" button.

In All Versions: The default of "Use system proxy settings" piggybacks on your Windows/IE "LAN" setting. "Auto-detect" can lead to a flaky connection. You may want to try "No proxy".

Any difference?