You are currently not using the browser action, therefore I removed it (its optional for both Chrome & Firefox).
I am probably not the only one who would be annoyed by a useless button that doesn't do anything when clicked on.
Good luck with you extension!
For future reference: this fixes the issue in Firefox but not Chrome. To hide the icon on Chrome, right click on the icon and click "Hide in Chrome menu."
You are currently not using the browser action, therefore I removed it (its optional for both Chrome & Firefox). I am probably not the only one who would be annoyed by a useless button that doesn't do anything when clicked on. Good luck with you extension!