Guys, let's get this right for once.
Mozilla is a company that creates a few internet-targeted applications, like their very good web browser called Firefox and an email client called Thunderbird, amongst other products.
Mozilla is also the name of an old web browser on which Firefox was then based. This browser itself was in turn based on the even older Netscape browser.
Guy: Man, Mozilla is an awesome browser.
Nerd: What, that old shit? At least get Firefox, dude.