Once you install the Firefox 4 Beta, you will notice the Feedback Add-on in the upper right corner. You can use this to provide instant feedback at any time. You will also be notified about user studies (run by Mozilla Test Pilot) which collect information about how you use Firefox, but not which websites you visit. You have control over your participation, and can choose to opt out of any study, or see what data has been collected. You will be asked before any data is sent to Mozilla.
New Tab Location
Tabs are given top visual priority for more efficient and intuitive browsing.
Stay in Sync
Synchronize your settings, passwords, bookmarks, history, open tabs and other customizations across multiple devices so you can take Firefox with you wherever you go.
Organize your Tabs
Reclaim your browser from tab clutter! Drag and drop your tabs into manageable groups that you can organize, name and arrange in a fun and visual way.
User Experience. The enhancements to Firefox provide the best possible browsing experience on the Web. The new Firefox smart location bar, affectionately known as the “Awesome Bar,” learns as people use it, adapting to user preferences and offering better fitting matches over time.
Performance. Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product.
Security. Firefox raises the bar for security. The new malware and phishing protection helps protect from viruses, worms, trojans and spyware to keep people safe on the Web.
Customization. Everyone uses the Web differently, and Firefox lets users customize their browser with more than 5,000 add-ons.