firefox profiles

As far as I know, the rules in Proxifier allow me to target applications (firefox.exe) as well as IPs/addresses or ports. But can I set Proxifier rules that are specific to a Firefox profile? For example, a rule for firefox.exe -p ProfileName1 and a separate one for firefox.exe -p ProfileName2?

How do all of you run multiple Facebook profiles on 1 computer without any issues? I have already gotten a few different private residential proxies. However, I am currently torn between creating different firefox profiles (+ disabling webRTC), and using multilogin. I heard that both work...

Title says it all. This is exactly the free solution that I have been looking for to manage multiple proxies simultaneously in Firefox. AKA - run multiple independent instances of the FF browser, each connecting to a different proxy.