Need to save a list of links, but don’t want to copy each one, one by one, individually?  Then you might check out Multi Links.  This Firefox add-on will let you open, copy, or bookmark multiple links, rather than having to handle each one individually. 
To get started, all you have to do is right-click and hold to drag a box around the links you want to effect or “take action” on.  When you release the mouse button, you [...]

Some people may find the fact that Firefox opens a new tab on the far right of your tab toolbar a blessing and some might find it a curse.  It really has to do with how many tabs you are look at, in one single browser.  For those who are cursed today, I have your solution.  The Tabs Open Relative extension changes how new tabs open up, which means no more tab surfing for you.
Once installed, the Tabs Open [...]

What was that tab you closed about three tabs back again? Could it have been the fourth tab back, before you got your coffee? If you find yourself using the Ctrl + Shift + T keyboard combination to bring up lost tabs a lot, there is a better way to get the job done.  The Undo Closed Tabs Button add-on for Firefox gives you a few ways to save your lost tabs.
This extension allows you to undo closed tabs [...]

Need another way to open your links? Sure you could left click on them or right click on them via your mouse. You can even middle click on them to open them in a new tab. Did you know though that you can left click on them – hold down the mouse button and release it on the tab bar? This will open the new link up there as well. Give it a shot next [...]

Need to open a new tab in a hurry? Sure, you could do it a number of ways. I have one that will get you there faster than all the rest. This is all you need to do:

double-click any empty spots on the tab bar

Now wasn’t that easy?