Forum Moderators: open
Mozilla (http://mozilla.org) is a popular open source browser with a lot in common with Netscape (although Netscape has less in common with Mozilla ;-))
Domin2 you may see a user agent that includes the word mozilla without being the mozilla browser. The this user agent for example:
Mozilla/5.0 (Platform; Security; OS-or-CPU; Localization; rv:1.0.2) Gecko/20030208 Netscape/7.02
While it does have the name Mozilla in it, it is actually the Netscape browser. Depending on what you are trying to do with your site this destinction may be important.