Internet Explorer does it. Chrome does it too. Now Mozilla is trying -- again -- to make Firefox run multiple processes at the same time.
The latest version of the desktop browser is incompatible with a huge number of existing themes.
Mozilla's Electrolysis project, which divides Firefox into multiple processes, is designed to help make the browser feel faster. Also coming: 64-bit support and better memory use.
There are reasons iOS and Windows RT hobble third-party browsers, but CNET's Stephen Shankland prefers the open approach Google takes with Android.