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!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

FireFox5 does not start

more options

I just upgraded to version 5.0. FireFox will not load after I try to start it. I get an error message saying

Error: Platform version '5.0' not compatible with:

minVersion >= 1.9.2.16 maxVersion <= 1.9.2.16

I just upgraded to version 5.0. FireFox will not load after I try to start it. I get an error message saying Error: Platform version '5.0' not compatible with: minVersion >= 1.9.2.16 maxVersion <= 1.9.2.16

All Replies (1)

more options

I tried to go back to version 4.0 ... same problem. Version 4 will not run either.

Same error box appears

Modified by ImmortalOneAndOnlyHeadBubba