The Internet holds billions of Web sites, and most browsers ask you to choose one to set as your home page. That doesn't seem fair. Firefox lets you have as many home pages as you want, and each one appears in its own tab whenever you start a new Firefox window.
You can specify multiple home pages in a few different ways. Here's the easiest way:
Load the Web pages you want to use as your home pages into one window, each in its own tab.
Click the General icon at the top of the Options window.
Under the Home Page boxed group, click the Use Current Pages button.
Alternatively, you can tell Firefox to set all the Web sites in one of your bookmark folders as the home pages by clicking the Use Bookmark button, selecting a folder, and clicking OK. This action will set as home pages only the bookmarks that already exist in that folder. In other words, any bookmarks you add to the folder in the future won't be home pages unless you return to this window and select the folder again.
Although Firefox offers a number of ways to choose Web sites as your home pages, the end result is always the same: Firefox includes a list of the site addresses in the Location(s) text box, separated by a | (shift+Backslash on most keyboards). (Firefox can't use more common separators like commas or spaces because those can be part of a site address.) Knowing this technical detail is quite useful because it allows you to remove a Web site from your home pages list by simply deleting its address from the text box and leaving the others intact. For example, if your home pages are Addicting Games, Kitten War, and The Onion, Firefox displays http://www.addictinggames.com | http://www.kittenwar.com | http://www.theonion.com in your Location(s) text box. To remove Kitten War as a home page, simply delete it, leaving http://www.addictinggames.com | http://www.theonion.com.
Click OK to save your changes.