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Updated Firefox. Hit the home icon or new tab and says the address isn't valid

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Updated Firefox.When I opened it back up,restore session said "the address isn't valid." Hit the home icon to make Bing my search engine and see If I could make changes but it would open a new tab stating "the address isn't valid" Refreshing did not do it.....Thought it would...for a half hour said it was "almost done" but it seemed stuck....not froze. Everything appears to be working....new tab...restore session...trying to access firefox home..... all give me " the address isn't valid ". Please help...Thanks Roj...

Updated Firefox.When I opened it back up,restore session said "the address isn't valid." Hit the home icon to make Bing my search engine and see If I could make changes but it would open a new tab stating "the address isn't valid" Refreshing did not do it.....Thought it would...for a half hour said it was "almost done" but it seemed stuck....not froze. Everything appears to be working....new tab...restore session...trying to access firefox home..... all give me " the address isn't valid ". Please help...Thanks Roj...

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Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: "3-bar" menu button or Tools > Add-ons > Appearance
  • Do NOT click the "Refresh Firefox" button on the Safe Mode start window

Do a clean reinstall of the current Firefox release and delete the Firefox program folder before installing a fresh copy of the current Firefox release.

If possible uninstall your current Firefox version to cleanup the Windows Registry and settings in security software.

  • Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you uninstall and reinstall or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.

If you keep having problems then create a new profile to test if your current profile is causing the problem.