Optimal Access offers an extension to Firefox Browsers that lets you curate your tabs and group them the way you work. Easily access hundreds of tabs in one window and get anywhere with 3 clicks or less!
Tabs will only open when you click on them, and closing them will leave the tab in place.
This is an Extreme Browser Makeover. A simple yet powerful way to customize and save access to your favorite web sites. The product is very intuitive and easy to use. When you first install it you get a number of Groups as examples of what is possible.