Multi-account containers: Facebook icon and colour not retained between sessions
This is not the worst issue in the world, but I can't work it out.
I use Multi-Account Containers and have the facebook Container and Google Container extensions.
In Settings >> General >> Container Tabs...Settings, I can choose the colour and the icon that represents each container.
That works fine within a session, but when I restart, the Facebook container has always reverted back to the fence icon, in black. If I change the icon to something else, and/or change it to a different colour, it's ignored when I close and restart.
None of the other containers (Personal, Shopping, Banking, Work, Google) have this problem - I can set whatever icon and colour for them I like, and it's retained when I restart Firefox.
Any ideas?