Logo is shown on firefox on linux on top of the camera picture

Spreedme app is working fine except for one small thing: when I start the call in firefox (both linux and windows) then other chat partners see a logo (in my case letter ā€œEā€) in front of my face. Other browsers work fine.

Did anyone experience same behaviour? I will post more data if needed, for now just wanted to know whether is is a general firefox problem with NC12 and spreedme app.