The Google Toolbar for Firefox appears to closely duplicate the features of its Internet Explorer counterpart, except of course the Popup Blocker which is a feature present in Firefox to begin with.
This is interesting news, not only because other websites like Yahoo! have recently began to offer Firefox-compatible toolbars of their own as well, but because the Google Toolbar in particular had been unofficially cloned for Mozilla (suite and Firefox) as the Googlebar months before.
System requirements wrote: â€¢ Windows XP/2000 SP3+, Mac OS X 10.2+, or Red Hat Linux 8.0+
â€¢ Firefox 1.0+
(Note to anyone curious: It is possible to attempt installing the Google Toolbar on Windows 9x, but a script error appears when Mozilla Firefox starts and the toolbar itself will be nonfunctional.)