Does my add-on need to be updated?

WebExtensions are becoming the standard for add-on development in Firefox. It will be the only type of extension supported in Firefox by the end of 2017.

We've compiled a list of resources to help you through the transition.

You will need your add-on guid, which is found in one of the following places:

Your add-on guid should be one of the following:


The list of add-on ids is generated by inspecting add-ons listed on addons.mozilla.org. If you have questions about your add-on, our team is here to help.

Source of this tool is on github.