Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Learn More

"Missing Profile" cannot even open Firefox

  • 2 wótegronje
  • 1 ma toś ten problem
  • 9 naglědow
  • Slědne wótegrono wót HawkEye

more options

I am on Mac OS 10.13.6 and I cannot open Firefox and it says Profile Missing, and will not open. I don't care about any bookmarks or anything I just want to use Firefox as an alternative browser to Safari.

I am on Mac OS 10.13.6 and I cannot open Firefox and it says Profile Missing, and will not open. I don't care about any bookmarks or anything I just want to use Firefox as an alternative browser to Safari.
Pśipowjesone fota wobrazowki

Wšykne wótegrona (2)

more options

Could you try the steps in the following article: How to run Firefox when your profile is missing or inaccessible.

Does that work on your Mac?

more options

@actionimages, I'm a bit late to the party. But i've had this happen twice now on OS. I've add success by doing the following: 1. uninstall firefox 2. Go to ~\Library\Cache.txt and delete this file (you can access Library from finder and holding the option key while clicking on "Go") 3. reinstall firefox.