I wish Containers would get some love. Ability to set root domain for example would be great, so I could keep all Bandcamp sites in a single container without micromanagement for example.
I also wish there was a simple way to suspend tabs, essentially turning them into the "ghosts" they are when you start the browser. So many times I want to keep a tab around for easy access, but they got some stupid JS framework running sucking CPU for no good reason.
That said, overall I'm quite pleased with Firefox and hope Mozilla keep developing it. We need a proper Chrome alternative.
I just want temp containers. With all the cookie bullshit you have to pick and choose on each website, I just want to accept it all and then flush the container once I'm done with the website.
It's nice when paired with the "I don't care about cookies"[2] extension which auto-accepts cookie requests and makes sure you never see any cookie permission dialogs.