Context buttons/icons can modify rich text contents

New Firefox addon have a bug.
It adds icons to WYSYWIG editor like TinyMce if there is input fields inside.
And when I post data to server - this icons is in code.
This bug appeared only in new design of addon.
How I can disable this icons at all? (no option in settings)

I’ve created a new topic for this post since I think it would be ideal if we could find some way to avoid adding the icon to WYSYWIG editors irrespective of the configuration options being considered in the related topic at How to configure the new Contextual Kee buttons