I installed Firefox 5.0.1 from oldapps.com on windows7 enterprise sp1 64bit operating system. Now I would like to know, Whether firefox 5.0.1 is 32 bit edition/version? And how to figure out this? Where as in IE @ Help >>> About Internet Explorer we can come to know, Whether it is 64 bit or 32 bit. i.e. In IE, If it is 64, Then it is reflected else nothing is present (meaning it is 32 bit). Thanks, Govardhan.