Hi, please contact me to saverio.morelli@protonmail.com to get more help.

If you cannot enable "Also insert directly", maybe it's because you deny the permission? In that case, go to Addons (about:addons), select "Emoji" and in the "Permissions" tab be sure you enabled the permission "Access your data for all websites" (which permits to insert directly in the websites).
I hope this can help you, and in case I remain available via email