Not sure what causes this, or how to recreate it. The icon seems to sporadically decide to turn grey. On a website that had been loaded before it 'greyd' everywhere it's fine, shows normally. On any new tabs it's just grey.

The matrix still loads fine when clicked.

Disabling and reenabling the extension fixes this. Wish I knew how to recreate this, seems like it just happens after a matter of time.