I was a bit surprising when I found out from Firefox Site the release of Firefox 4 with all its New Looks.. But not thrilled because it has similar feel of opera 10.x when i saw its GUI,I can call it a replica.. but people Its not the same thou
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.
Manage Your Add-ons
An easier way to manage your add-ons and discover new options for personalizing your browsing.
- Tabs are now on top by default on Windows only - OSX and Linux will be changing when the theme has been modified to support the change. If you don't like tabs on top, you can disable them by right-clicking empty space on the toolbar chrome and unchecking Tabs on Top.
- On Windows Vista and Windows 7 the menu bar has been replaced with theFirefox button. You can get your menu bar back by right clicking empty space on the toolbar chrome and making sure Menu Bar is checked.
- You can search for and switch to already open tabs in the Smart Location Bar. This feature is a little strange, and I'm not entirely sure how often a person would use it in its current implementation, but I suppose it could come in handy.
- The stop and reload buttons have been merged into a single button on Windows, Mac and Linux. Handy, since many of us have been consolidating those buttons since Firefox 3.
- The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like).
- Crash protection for Windows, Linux, and Mac when there is a crash in the Adobe Flash, Apple QuickTime or Microsoft Silver-light plug-ins.
- Native support for the HD HTML5 WebM video format. Remember, WebM is Google's open video format.
- More responsive page rendering using lazy frame construction.
That covers pretty much everything that stands out in Firefox 4 so far, though a couple of feature tweaks that aren't specifically highlighted in the release notes that we particularly like include:
- The new add-ons manager, which loads in a tab of its own instead of a separate window.
Image Source:Life Hacker