same. saved my ass already a few times when doing some reverseengineering voodoo. being able to set a valid https cert makes it easier to redirect apps than to bypass forced HTTPS. had to pretend to be a update server for something once and patching the URL was enough via getting a cert quickly (using DNS-01 challenge, no exposed ports ever)
you can use a secondary firefox profile. starting firefox with the --no-remote -p switches allows to load it alongside the main profile (-p loads the profile manager and --no-remote suppresses the "open new window in existing profile" behavior
@DorianSnowball Had similar issues at saturday morning where a rewrite failed hard.... luckily i had the friday evening state captured safely for rollback via git.
https://github.com/masterX244/GPNBots if you are curious to peek at how my bot worked (especially the magic that i used to avoid spooling up in a dead end

GitHub - masterX244/GPNBots
Contribute to masterX244/GPNBots development by creating an account on GitHub.
GitHub@DorianSnowball Bit late but got curious: what was your bot username?
had played all days, too under same username as used here
Element is only one of the clients for the matrix network. And as long as it follows the standard you can use other clients, too