Tabbed Browsing
Tabbed browsing in Firefox lets you load Web pages in separate tabs of a single browser window, so you can jump between them quickly and easily. Perhaps you're reading a news story and want to follow an interesting link without losing your place in the original story. With tabbed browsing, you can do this without filling your desktop with new, unorganized browser windows.
See how much faster and easier it is to stay current with your favorite news, explore search results, and shop multiple Web sites at once. With new drag and drop reordering, you can also rearrange your tabs however you like.
Check it out
Bookmark all tabs in a folder
If you have a set of tabs open and you want to bookmark them all at once, select Bookmark all Tabs from the Bookmarks menu to create a bookmark folder that contains them all.
A tabbed set of home pages
You can define a set of tabs as your home page. Load the pages in separate tabs in your browser window, and set them as your home page in your user preferences. When you click the Home button in the toolbar, all of the tabs you just specified will open together.