One of the features that I really like in Firefox is the ability to open a link in a new tab easily. I’ve got two ways to do this.
I can hold down the Ctrl key while I click the link. I can also use the mouse’s scroll wheel to click on the link. Either way, the link opens in a new tab in my Firefox window.
There’s a related feature that is even more powerful — I can open multiple bookmarks in separate tabs, all with one click on one icon.
It’s not a standard icon – it’s a feature within Firefox. In fact, there are two different things you can do that will open multiple web pages in separate tabs at the same time.
First, you can set your "Homepage" to multiple tabs with multiple different web pages displayed. Just open up the tabs you want to see, in the order you want to see them (Firefox lets you drag the tabs left and right, if you like.
Then, Tools > Options > Main tab. In the Startup section at the top fo the Main tab, click on the button that says Use Current Pages. It’s done.
Now, when you open Firefox or click on the Home icon in Firefox, it will open all those web pages.
Second, the other feature is a nicer, more general setting that I use. I found the multiple pages homepage fun, but it made me wait too long, so now I just open one page as Home.
This more general way uses the fact that Firefox will let you store bookmarks in Firefox bookmarks folders and even have multiple levels of subfolders within those folders.
If you click on a Firefox bookmarks folder by using the CENTER mouse button (most scroll wheels act as a button also), Firefox will open all the bookmarks that are in the folder.