The URL Lister extension of Firefox

What if you open too many tabs in firefox? It's necessary since these are all needed for fast reference. But Firefox memory usage is too high and slows down the machine.

A better way is to use a page to keep all these links. So instead of opening all these tabs, just keep the one page open, kind of like a bookmark feature.

This can be easily done by installing the URL lister extension of Firefox. Afterwards it's available in the Tools submenu.