Over the coming year, Firefox will be putting the finishing touches on a plan it set in motion in 2015, which was to replace the aging Add-ons API with a new system called WebExtensions, based on the ...

Firefox supports small programs, or plug-ins, that add extra functionality to the browser. These programs are called Add-ons. These programs can add a myriad of features ranging from a new toolbar ...

An expired certificate on the Mozilla Add-ons infrastructure is disabling Firefox add-ons for millions of users, and is also preventing users from re-activating or (re-)installing extensions. The ...

Firefox is popular in part because it allows anyone to extend the browser with all sorts of additional functionality through its add-on framework. Add-ons can turn Firefox into a BitTorrent client, an ...

Mozilla has released a Hall of Fame that software developers definitely don't want to be on. To promote the fact that not all Firefox add-ons are created equal, the browser-builder has named and ...

Firefox add-ons are a great way to add features and improve security in Mozilla’s browser, but they can seriously slow performance too. Now Mozilla is taking action against those speed-killing ...

Firefox 3 was released just this June, and many Firefox fans believe the new version is clearly the best browser you can get. You can make it even better with free ...

The big cheeses of the Mozarella foundation will ship Firefox 57 as the first version of its browser that will not support legacy Firefox add-ons. Firefox 57 will support only new add-ons written on ...

Just two weeks in, we're already huge fans of Firefox 4. It's a noticeable improvement over the previous version in speed, design, and customizable options. But customizing has its downside too. It's ...

Over the past two weeks, Mozilla's add-on review team has banned 197 Firefox add-ons that were caught executing malicious code, stealing user data, or using obfuscation to hide their source code. The ...

Firefox Chief Technology Officer Eric Rescorla has written a detailed blog post explaining exactly how the browser's add-ons came to break all at once last week, how it was fixed, and how the company ...

I think we all know that add-ons have grown integral to the Firefox experience — and popular, to say the least — but we didn’t know just how popular until now. Today, Mozilla said through its blog ...