While the awesome bar, download pause and resume, malware protection, the new themes, and serious performance improvements are perhaps the most representative features introduced with Firefox 3, here are some other useful ones you may not be aware:

1. Duplicate tabs. Press Ctrl (Cmd on Mac) while dragging a tab to create a duplicate of the dragged tab including its history.

2. Move tabs to another window. Just drag a tab and drop it on another window to move it. If the dragged tab is the last one in its window, it will be closed.

3. Resize the search bar.

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