It hides all the unnecessary ads on websites you frequently browse – saving you bandwidth, clearing up your display’s real estate, and keeping you from loading malicious adware. of users: 9.8 million+ | Firefox Store Rating: 4.6 out of 5Īdblock Plus is one of the best Firefox add-ons to block unwanted ads online. The 16 Best Mozilla Firefox Add-ons & Extensions 1. This article focuses on the best Mozilla Firefox extensions that will make your browsing experience stress-free, safe and secure. With these Firefox extensions and add-ons, you can better control the behavior and functionality of your browser, plus add some useful tools that you most frequently use. Today, we are going to look at some of the best Firefox add-ons, apps, and extensions you should have in your browser.