根据此博客文章自2016年1月21日起由Chris Mills（Mozilla的高级技术作家）您无法在FF环境中使用它...

According to this blog post from January 21, 2016 by Chris Mills (a senior tech writer at Mozilla) you can't use it yet in web environment on FF ...

...因为允许用户授予应用程序使用权限的UX / UI尚未实现。

... because the UX/UI to allow users to grant an app permission to use it is not yet implemented.

...

这是错误报告，您可以投票。

目前，您必须在 chrome 使用它的环境（扩展名）。

And currently, you'll have to be in the chrome environment (extension) to use it.