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Can't install FIREFOX application

  • 1 reply
  • 1 has this problem
  • Last reply by ARMAN KHAN

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Firefox stopped working on MacBook pro running OS 10.13.6. I deleted the app and tried to download a new one, the icon is crossed out and a prompt saying the app may be damaged or incomplete. Nothing had been changed on my system when this happened.

All Replies (1)

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hello rick,

Clear all cookies, site data and cache

  • Click the ≡ menu button top right . 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.

To start Firefox in Safe Mode:

  • Click the menu button. , click Help and select Restart with Add-ons Disabled
      Firefox will start up with the Firefox Safe Mode dialog. ...
  • When the Firefox Safe Mode window appears, click the Start in Safe Mode button.


  • Click the ≡ menu button top right . and select Help
  • Click About firefox

Automatically update your browser

'NOTE: Restart firefox and computer

tell me its help.

thank you!