Introducing the Extension Compatibility Tester

With Firefox’s move to a modern web-style browser extension API, it’s now possible to maintain one codebase and ship an extension in multiple browsers. However, since different browsers can have different capabilities, some extensions may require modification to be truly portable. With this in mind, we’ve built the Extension Compatibility Tester.

Link: https://hacks.mozilla.org/2017/08/introducing-the-extension-compatibility-tester/