For those who need to expose font icons to your Episerver rich text editor, the below might help… My plugin uses FontAwesome 5.3.1. The code is on Github. References that helped direct me to this solution: Josh18 (TinyMCE for Joomla) – https://github.com/josh18/TinyMCE-FontAwesome-Plugin FortAwesome (ofcourse) – https://github.com/FortAwesome/Font-Awesome/blob/master/advanced-options/metadata/icons.yml TinyMCE doco – https://www.tiny.cloud/docs/