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Why do I get error message "The URL is not valid and cannot be loaded" when everything looks OK?

  • 1 reply
  • 12 have this problem
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  • Last reply by cor-el

LogicalJohn
LogicalJohn
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This message pops up while using programs like yahoo mail. I delete it and everything continues as normal.

This message pops up while using programs like yahoo mail. I delete it and everything continues as normal.

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cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

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

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

  • Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
  • Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")