What is Manifest v3? Chrome versions the APIs they provide to extensions, and the current format is version 2. The Firefox WebExtensions API is nearly 100% compatible with version 2, allowing extension developers to easily target both browsers. In November 2018, Google proposed an update to their API, which they called Manifest v3. This update includes a number of changes that are not backwards-co
![Mozilla’s Manifest v3 FAQ – Mozilla Add-ons Community Blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/327220f2e20c2737cf810248496595410702b9cb/height=288;version=1;width=512/https%3A%2F%2Fblog.mozilla.org%2Faddons%2Ffiles%2F2019%2F10%2FFx-Browser-icon-fullColor.png)