I have a Fusion Gamer based theme on Xenforo 2.0.2 and I also have Google Chrome Grammarly extension installed but when I try and reply to a thread the text box wobbles and goes a bit crazy for some reason. It makes it very hard to read what you are typing as the text box moves a lot as you are actually writing.
I'm not sure if it is only a problem with Grammarly Premium or not but you should be able to test it with the free version.
I'm not sure if it is only a problem with Grammarly Premium or not but you should be able to test it with the free version.