Although i love this extension i have some problems with Firefox containers lately I usually had 3 different containers for Google Gmail and YouTube but now for some reason i can not separate Google from Gmail Firefox 84.0.1 (64-bit)

click extension icon in toolbar click greater than sign to right of container at issue manage this container manage site list remove the sites you don't want

repeat as needed

I know how to use the extension but since yesterday i can't separate google form gmail