Firefox 153 ships the new publicSuffix WebExtensions API. This API lets extensions ask the browser for the registrable domain (eTLD+1) of a hostname. It uses the browser’s built-in, always-up-to-date copy … Read more

We had a bumper release of WebExtensions API updates in Firefox 153. To start, there is a permissions change that affects how your extensions access local files. We then have … Read more

Intro Hey everyone, we’ve been working on some exciting changes, and want to share them with you. But first, let me introduce myself. I am Christos, the new Sr. Developer … Read more

Hey everyone! I’m Christos Bacharakis, and I’ve recently joined Mozilla as the new Add-ons Senior Developer Relations Engineer. I’m here to help developers overcome technical challenges so your extension visions … Read more

Extensions have long been at the heart of the Firefox — providing users with powerful options to personalize their browsing experience. Nearly half of all Firefox users have installed at least … Read more

Every so often we host community-driven curatorial projects to select new Firefox Recommended Extensions. By gathering a diverse group of community contributors who share a passion for the open web … Read more

As of November 3rd 2025, all new Firefox extensions will be required to specify if they collect or transmit personal data in their manifest.json file using the browser_specific_settings.gecko.data_collection_permissions key. This … Read more

“What if we did a Spotify Wrapped for your browser?” wondered a group of Cal State Monterey Bay computer science students. That was the initial spark of an idea that … Read more

In response to feedback we’ve heard from the community, AMO (addons.mozilla.org) just introduced a new feature allowing developers the ability to quickly roll back to a previously approved extension version. … Read more