This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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 upgraded firefox 3.6.10 to 3.6.11 and rebooted...when logged back in firefox doesnt start and is giving an error saying 1.9.10 is not compatible wth 1.9.11

  • 2 replies
  • 47 have this problem
  • 1 view
  • Last reply by BloodStones

more options

this is the entire error message Error: Platform version '1.9.2.10' is not compatible with minVersion>=1.9.2.11 maxVersion<=1.9.2.11

this is the entire error message Error: Platform version '1.9.2.10' is not compatible with minVersion>=1.9.2.11 maxVersion<=1.9.2.11

Chosen solution

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.

Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
Don't remove personal data when uninstalling.

It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.

You can skip the step to create a new profile, that is not necessary for this issue.


See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Read this answer in context 👍 2

All Replies (2)

more options

Chosen Solution

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.

Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
Don't remove personal data when uninstalling.

It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.

You can skip the step to create a new profile, that is not necessary for this issue.


See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

more options

Works perfect...went into safe mode and deleted the program folder for firefox...did a clean install and its working normally nw...

thanks a lot