Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Here are some of the additional benefits of OneTab:
Depending on how many scripts are running inside your tabs, moving them to OneTab can also speed up your computer by reducing the CPU load. We have also had reports that this also contributes to your computer resuming from sleep more quickly.
Want to learn more about this extension? Check it out at the Firefox Add-ons website.