The issue with Norton products (and some other third-party vendors) is that Norton (and others) did not take the time during the year-long development period to test their product for compatibility with Firefox 4. *'''It is the responsibility of vendors/developers to be certain that their products are compatible with any new browser, Firefox or others.''' *Third- party vendors of Firefox Add-ons have the information and have access to alpha and beta builds of Firefox throughout the alpha and beta testing phases. * Many do not update their products until a final release of a browser, '''''<u>thereby penalizing their paid customers</u>'''''. *'''File complaints with Norton and/or your third-party vendor'''. *There are problems with a number of security products and the newest browsers (Firefox 4, IE 9, etc.). Contact Norton about the issue with Norton products. See: *https://support.mozilla.com/en-US/questions/801250 *http://www.wilderssecurity.com/showthread.php?t=295912