Is there a way to autostart a specific app into a scratchpad?

[ecribia]

I'd like to use a specific firefox profile as a scratchpad, and with how the current scratchpad config works, it will catch both my main firefox profile and the scratchpad profile as a scratchpad.

In hyprland my workaround is to use:
exec-once=[workspace special:2 silent] firefox -P scratchpad

This lets me autostart the firefox profile as a scratchpad, but then run my main firefox profile as a non scratchpad.

[AgrimV]

You can somewhat do that like this:

# bind=MOD,KEY,toggle_named_scratchpad,appid,title,command
bind=alt,h,toggle_named_scratchpad,signal,none,signal-desktop

I do not tinker much with Firefox profiles but if it can be made to launch with a custom title or appid, you can use the following window rule to make it so that it always opens in the scratchpad and then launch it using exec-once:

windowrule=isnamedscratchpad:1,width:1280,height:800,appid:signal

If not, then I think you might have to trigger the keybind to launch it in scratchpad.