I share BugMeNot, a platform providing shared login credentials to bypass mandatory registrations on popular websites. It includes a Mozilla extension to automate entering these community-contributed usernames and passwords directly in your browser.
I found that MessenPass can recover passwords for Gmail, Yahoo Mail, and Hotmail by extracting saved credentials from desktop instant messenger clients like GTalk. It exploits the fact that these accounts often share the same login information.
I'm keeping an eye on Mozilla's open-source development, which continues to yield useful innovations like the new Bayesian spam filter and type-ahead find feature. It's a great example of how community projects evolve quickly.
I'm trying Mozilla because its native SOAP support lets me build pages with dynamic Google and Amazon content. By using JavaScript to make API calls directly, I can create these features without needing a back-end web server.
I explored 101 features Mozilla offers that Internet Explorer lacks. While I rely on tabbed browsing and popup blocking, most other features feel unnecessary, and I believe both Mozilla and Opera still have significant catching up to do.
I found Mozilla 1.2 beta impressively fast and stable. I particularly enjoy the tabbed browsing and Type Ahead Find features, though the current inability to customize keyboard shortcuts is my only significant complaint.