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

I cannot open Firefox.

  • 1 reply
  • 2 have this problem
  • 16 views
  • Paskiausią atsakymą parašė cor-el

more options

I cannot open Firefox. It says "Error platform version '101.1' is not compatible with mini version = 101.0 maxi version 101.0" Please tell me how to get back into Firefox. Susan Peckitt

I cannot open Firefox. It says "Error platform version '101.1' is not compatible with mini version = 101.0 maxi version 101.0" Please tell me how to get back into Firefox. Susan Peckitt

All Replies (1)

more options

An error message about XPCOM missing or about platform version usually happens because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists.