WebExtensions API Changes (Firefox 149-152)
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
Articles in “webextensions”
Announcing data collection consent changes for new Firefox extensions
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
New Extension Data Consent Experience now available in Firefox Nightly
In a previous blog post I explained that we’re working to streamline the data consent experience for extensions and allow users to consent to sharing data with extensions directly in … Read more
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
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
Manifest V3 updates landed in Firefox 128
With the release of Firefox 128 comes additional Manifest V3 improvements as the engineering team continues to make cross-browser compatibility work a key focus, especially related to content scripts and … Read more
Manifest V3 Updates
Greetings add-on developers! We wanted to provide an update on some exciting engineering work planned for the next few Firefox releases in support of Manifest V3. The team continues to … Read more
Manifest V3 & Manifest V2 (March 2024 update)
Calling all extension developers! With Manifest V3 picking up steam again, we wanted to provide some visibility into our current plans as a lot has happened since we published our … Read more
Changes to Android extension signing
We recently identified a bug in the addons.mozilla.org (AMO) external API that caused all signing requests to mark extension submissions as being Android compatible. A fix for this bug will … Read more