Spreed.me videocalls : firefox extension not signed


#1

My 53.0.2 release of firefox refuses to install the spreed.me extension because it is not signed.
How can I get a signed extension or a workaround ?
I set to “false” the xpinstall.signatures.required option in about:config with no effect.


#2

URL : https://addons.mozilla.org/fr/firefox/addon/nextcloud-video-calls/