Will move the button to settings and add option to disable browser icon and shortcut in the coming version.

Thanks for your reviiew :)

Update1: fixed and updaed on beta channel:
https://addons.mozilla.org/en-US/firefox/addon/no-youtube-comments/versions/beta

Update2: Please check out Version 0.4pre4 ,
https://addons.mozilla.org/en-US/firefox/addon/no-youtube-comments/versions/beta
More updates and fixes for your problem.
PLease try it and let me know if the problem persists.