Unfortunately I can not reproduce this problem. However, I can not try it on a Mac because I don't have one. It works for me with Firefox 69 on Linux and Windows and with Firefox Nightly 71 on Linux. Are you able to try it on Linux or Windows?

Can you also check in the settings of the Add-on under "Modify the visibility of the buttons" if any checkboxes are checked? All buttons with checked checkboxes are hidden.

Also, I would prefer if you create an issue (https://gitlab.com/konstantin-mueller/better-netflix/issues) or write me a mail (konstantin.mueller.dev@gmail.com), because we can not answer each other here and we will not be notified after editing the text.

Edit: The Add-on had an issue where the buttons were not displayed when autoplay is disabled. If you have autoplay disabled, your problem should be fixed. Can you please update the Add-on and try again?