Facebook videos doesn't play due to FX_cast

[jonnisell]

Hi community,
Facebook videos doesn't play for me and I've isolated the issue to FX_cast add-on in Firefox. I opened up Developer tools, but nothing seems wrong or no data missing in fetching a page.
The issue is hence, I'm not trying to cast anything and afaik Facebook's player doesn't enable streaming, yet the plugin blocks videos playing on regular Facebook pages.

My env:
Mac OSX 10.15.7
FF version 85.0.2
Plugin v0.1.2 and bridge v0.1.0

[hensm]

Can confirm it breaks something. Just remove facebook from the whitelist for now.