One of the cool Google Chrome browser features is the ability to pin tabs in the browser by default.
Pinned tabs are shifted to the left side of the tab bar where their tab will be changed to just show the favicon for the web site in question. Thanks to the Pin Tab add-on for Firefox, you can bring that functionality to your favorite browser.
Another neat feature of this Firefox add-on is when you type something in the address bar, or select a result in the address bar while a pinned tab is selected, the address you selected will open in a new tab – leaving your pinned tab alone.
How do you pin a tab?
You can also pin a tab by dragging it to the left of already pinned tabs.

Want to quickly search for more social media or search engine information for any web page or link on the Web? yExplore 2 is an excellent add-on for Firefox that does exactly that, and more.
Need to quickly navigate back in the browser history? Now sure, you could click the actual backwards button, in the Firefox navigation toolbar. I have another alternative for you to try though. MileWideBack is an add-on for Firefox that will let you click on the left border of your Firefox window to go back to the previous web page you were viewing.

In need of a way to download all the images you may have uploaded to your Facebook photo album? Sure you could go through each image, click by click and download each one individually. Why do that though, when you have FacePAD. This extension will let you grab all the photos from any album you need on Facebook.