The Extensions Button is really good and acts similar to the Overflow Menu which is why I like it.
The problem I have with it are the extensions that work in the background, you can't click on them, they are greyed out, so there's no point having them displayed in the drop-down. They're basically clutter. If I want to manage them I can simply do that on the Extensions Page.
So I want the option to choose the extensions I want to see in the Extensions Button.