Exactly what I was looking for !
You need only to add an option : Disable for all websites and enable it for only a specific website.
The question (-1 star) is about the data security of our browsing websites using this plug-in.
Well, it uses the entire privileges, I think you could limit that to ensure the user that its data is not be used in other purposes.

good

Works, but as said before, an enable/disable button in context menu would be nice.