=== Won't this limit experimentation? ===
As isIf WebExtensions were ultimately limited to the Chrome model, it willwould. We are trying to devise But we're actually designing a system that will allow for providing extension authors to have with the flexibility to implement innovative features that the WebExtension API doesn't currently allow. [https://discourse.mozilla-community.org/t/proposal-native-js-to-embrace-extend-the-webextensions-api/3457 Some discussion] has already begun. The intent is for add-on authors to experiment through this mechanism , with the knowledge that there are no guarantees of compatibility between Firefox releases , and use that to inform future additions to the stable WebExtension API.
=== I already have a XUL extension. How is this not terrible news for me? ===
