Breaking The Ground

• «Privacy and Security
  Built with your security in mind, Firefox keeps your computer safe from malicious spyware by not loading harmful ActiveX controls. A comprehensive set of privacy tools keep your online activity your business.»

So not loading ActiveX is a feature? Ok, Opera has not loaded ActiveX controls for ages :-)

• «S, M, L or XL — It’s Your Choice
  Firefox is the most customizable browser on the planet. Customize your toolbars to add additional buttons, install new Extensions that add new features, add new Themes to browse with style, and use the adaptive search system to allow you to search an infinite number of engines. Firefox is as big or small as you want.»

I think Internet Explorer did this years ago. Opera, too, does most of this, and it can install themes/skins without restarting, too :-)

Отсюда, почитайте.