Since update X open firefox: Platform version22.214.171.124 not compatible with minVersion>
Having had the update I can't open firefox at all. It comes up with Platform Version 126.96.36.199 is not compatible with minVersion>188.8.131.52 maxVersion
Download a fresh copy of Firefox ( http://www.mozilla.com/firefox/all.html ) and do a reinstall of Firefox over the top of the current version. If that still causes the same problem then do a clean reinstall.
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. 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 initially skip the step to create a new profile, that may not necessary for this issue. 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