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Firefox will not open

  • 6 Antworten
  • 1 hat dieses Problem
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  • Letzte Antwort von FredMcD

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I received an error message warning of suspected malware when attempting to update a Firefox password using Dashlane and chose the block option. Now whenever I try to open Firefox I get this message:

The application “Firefox” can’t be opened.

I have tried reinstalling Firefox but it doesn't work. I do not know which app sent the original message, since I did not have Norton app blocking activated.

Ausgewählte Lösung

You may have ad/mal-ware. Further information can be found in this article;
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. Each works differently.
If one program misses something, another may pick it up.

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Alle Antworten (6)

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hello

becket.mcgrath..........

STEP:1

Clear all cookies, site data and cache

  • Click the ≡ menu button. and select Options.
  • Select the Privacy & Security panel and go to the Cookies and Site Data section.
  • Click the Clear Data… button. The Clear Data dialog will appear.
  • Click Clear.

STEP:2

  1. In the address bar, type about:config > click 'Enter'.
  2. You'll get a warning message, This might void your warranty!, click I'll be careful, I promise!
  3. Double-click browser. ssl_override_behavior and change the value from '1' to '2'.
  4. Restart Firefox

tell me its help

thank you!

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Hi becket.mcgrath, I think it might be a system-level block. Could you check whether the "Security & Privacy" settings panel mentions anything about this:

https://support.apple.com/guide/mac-help/change-security-privacy-general-preferences-mh11784/mac

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Neither of these worked. For Arman: Are those menu commands for Firefox? If so, that won't work, as I can't open Firefox...

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Ausgewählte Lösung

You may have ad/mal-ware. Further information can be found in this article;
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. Each works differently.
If one program misses something, another may pick it up.

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Thanks. Nothing came up on malware scans but deleting and creating a new profile fixed it.

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That was very good work. Well Done.
Please flag your last post as Solved Problem as this can help others with similar problems.