Release 78.0 (64-bit)
Beta 79.0b5 (64-bit)
Firefox Nightly 80.0a1 (2020-07-08) (64-bit)
[Steps to reproduce]
1- Launch FF and open https://www.instagram.com/elenamalova_com/ with RDM activated.
2- Click the instagram post from video (https://www.instagram.com/p/CCTMfuhpOkq/)
3- Pop up window is displayed amplyfying the chosen photo
Comments should appear without issues
It's impossible to see comments.
Note: this happens in different accounts, with RDM deactivated it works fine