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

How can I fix an "Invalid URL" problem on Firefox/Gmail?

  • 1 ŋuɖoɖo
  • 72 masɔmasɔ sia le wosi
  • 6 views
  • Nuɖoɖo mlɔetɔ cor-el

more options

As of yesterday, when I try to access Washington Post headlines through Gmail via Firefox, the Post page opens but clicking on any headline brings up an "Invalid URL" error. This does not happen if I access Gmail via Chrome, or if I go to the Post web site directly with Firefox. It's only the Gmail/Firefox combination that produces the error. It worked fine until yesterday. Is there a fix I can try? Using Toshiba Satellite laptop wireless, Win 7.

As of yesterday, when I try to access Washington Post headlines through Gmail via Firefox, the Post page opens but clicking on any headline brings up an "Invalid URL" error. This does not happen if I access Gmail via Chrome, or if I go to the Post web site directly with Firefox. It's only the Gmail/Firefox combination that produces the error. It worked fine until yesterday. Is there a fix I can try? Using Toshiba Satellite laptop wireless, Win 7.

All Replies (1)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

  • Don't make any changes on the Safe mode start window.

See: