Don’t be fooled by the low, pre 1.0 version number, Chimera is an extremely solid Cocoa-based OSX Mozilla browser. I have been using it since .5 and been updating it through the daily builds since. There is an excellent team and community working on this project to assure the highest quality. If you use, IE you will gain many new functions like pop-up blocking and tabbed browsing to name a few. From Mozilla or Netscape 7, you will sacrifice Mail and Newsgroups as well as the page editor, but in return you will get one mean lightweight browser.