Skip to main content
December 16, 2019

Get started building extensions for the new Microsoft Edge

Starting today, the Microsoft Edge Addons store is now open for submissions for all developers. This is where users will find your extensions for the new Microsoft Edge. You can submit your extensions today by visiting the Partner Center Developer Dashboard.

In most cases, existing extensions built for Chromium will work without any modifications in the new Microsoft Edge. Check out our developer documentation to learn more about Microsoft Edge-specific APIs, tips on submitting your extension, and other helpful information. The extension submission program is in its preview phase and we are excited to hear and incorporate your feedback.

Transitioning your existing extensions to Chromium

As we move towards the general availability of the new Microsoft Edge on January 15th, 2020, we will no longer accept new submissions for Microsoft Edge Legacy (EdgeHTML-based) extensions after December 17th, 2019. We will continue to accept updates for your existing extensions.

We recommend you prioritize building new extensions for the new Chromium-based Microsoft Edge, and continue to support your existing EdgeHTML-based extensions to ensure a quality experience for active users.

Developers who have given consent for Microsoft to migrate their EdgeHTML extension listings to the new Microsoft Edge should begin to see their extensions available in the new Addons store experience in Microsoft Edge. If you publish an EdgeHTML extension and have not received any communication regarding its migration or are unsure of its status, please contact us at [email protected].

If you have already received a confirmation from us regarding migration, we encourage you to log on to the Partner Center Developer Dashboard to validate your access to the extension, and verify whether you can update it. Once the migration is complete, ownership and management will be completely transferred to you, and Microsoft will not be responsible for updating or maintaining your extension.

Migrating extension users to the new Microsoft Edge

We will migrate users’ extensions from the current version of Microsoft Edge when they update to the new Microsoft Edge (starting January 15th). Extensions will only be migrated for users if they are already available on the Microsoft Edge Addons store at the time of switching to the new browser.

We recommend that developers update your existing EdgeHTML extensions for Chromium and publish them via the new portal as soon as possible, so your existing customers will not face any interruptions when they update to the new Microsoft Edge.

Getting started

You can check out our initial developer documentation today, and expect to see more coming soon. If you have any additional questions about the extension submission process, please contact Microsoft Edge Addons Developer Support.

It’s a great time to build for the web, and we look forward to collaborating with you on our new browser!

– Killian McCoy, Program Manager 2
– Pratyusha Avadhanula, Senior Program Manager