WebExtensions Support for Tab Groups
Exciting news: with yesterday’s release of Firefox 138, tab groups are now available to all users! Tab groups have been a long standing feature request for users, so it’s wonderful … Read more
Articles from 2025
Rethinking Extension Data Consent: Clarity, Consistency, and Control
Hello, extension developers! I’m Alan, the Product Manager at Mozilla responsible for the Firefox add-ons ecosystem. I wanted to share news about a project we’re working on that will streamline … Read more
Root certificate will expire on 14 March — users need to update Firefox to prevent add-on breakage
UPDATE – 19 March We’ve discovered a bug impacting some older extensions for users on Firefox 128+ or ESR 115 (in this case even updating Firefox won’t resolve the root … Read more
Styling your listing page on AMO with Markdown
The Mozilla Add-ons team is excited to announce that developers can now style content on addons.mozilla.org (AMO) using Markdown. From the early days of AMO developers have been able to … Read more
Announcing the WebExtensions ML API
Greetings extension developers! We wanted to highlight this just-published blog post from our AI team where they share some exciting news – we’re shipping a new experimental ML API in … Read more