I love this! I tried to do this by running multiple instances of firefox in separate Docker containers using software I wrote for the task (see subuser.org), an

I love this! I tried to do this by running multiple instances of firefox in separate Docker containers using software I wrote for the task (see subuser.org), and while it works, for more than a few different accounts it gets slow to switch between them because my system won't keep all of the instances of firefox in memory.