Select History and look for two items at the bottom of the menu -- Recent Closed Tabs and Recently Closed Windows. From those menu items, select the tab or window you want to re-open. Note that this works only for tabs and windows you've closed in your current browsing session. After you end a session, you won't be able to restore them.

Firefox 3.5 also supports watching video and listening to music directly in a Web page, without having to launch any plug-ins, by supporting the audio and video elements. The Web page itself plays the video, and includes audio and video controls. You can even download the video or audio by right-clicking and saving it.

For all of this to work, though, the elements have to be in the page itself, which means the developer has to code it that way. At the moment, there are very few pages that contain these kinds of video and audio elements; only time will tell whether they become popular.

Firefox 3.5 has taken a page from Chrome, letting you drag a window out of a browsing session and launch it as its own browsing session, or else drag a tab from one browser session into another to combine them. In addition, when you drag a tab to reposition it among other tabs, you see a thumbnail of the tab as you move it.

Firefox now also supports what is called Location Aware Browsing, which tells Web sites your location so that they can deliver geographic-relevant information for online maps or to help when you're searching for local information and businesses.