After installing the add-on you will find a small ghost icon in your toolbar. When you are working in the Koenig editor of you Ghost blog, you can click on the Ghost which will apply a few patches to the editor so that Grammarly will work as expected.
It might take a few seconds before Grammarly's annotations will actually show up in the editor and you need to make sure that the Grammarly add-on is setup and running in Firefox.
