Comodo SSL certificatess are trusted by over 99.3% of internet browsers (equal to VeriSign and Thawte certificates). The only difference between one SSL type and another is the browser recognition. You can rest assured the Comodo SSL certificates we our selling have among the highest browser recognition in the industry. To name a few of the browsers: all Internet Explorer 5.00 and above, Netscape 4.x and above, AOL 5 and above and Opera 5 and above and comes pre-installed with all Windows 98SE, Windows ME, Windows 2000, Windows XP, Mac OS 8.5, Mac OS 9.x, Mac OS X operating systems.