I have limited experience in using multiple Firefox profiles, but assuming it works like Chrome's, I like Multi-Account Containers instead because it lets me mix and match tabs running on different containers if you really have to.
I mean, I appreciate keeping a single window dedicated to my Work container running all of my work tabs to properly isolate my sessions, but sometimes I have services that I have to login on other profiles (e.g., I use a consultant Miro account that I DO want to run on the same window, even if it's not using my Work container).
It's also a lot easier to identify which tabs are running which containers thanks to their colored tab markers and the container name indicated on the address bar. It's essential if you have to say, login to two separate Gmail sessions on the same window without their sessions getting mixed up.
Finally, it's different from profiles because you can optionally associate websites to containers (e.g., if I open ycombinator.com it's opened using my Personal container while opening miro.com automatically loads a different container, while I disable this feature for sites that I login across multiple containers for different contexts, such as Gmail or the AWS Console)
I mean, I appreciate keeping a single window dedicated to my Work container running all of my work tabs to properly isolate my sessions, but sometimes I have services that I have to login on other profiles (e.g., I use a consultant Miro account that I DO want to run on the same window, even if it's not using my Work container).
It's also a lot easier to identify which tabs are running which containers thanks to their colored tab markers and the container name indicated on the address bar. It's essential if you have to say, login to two separate Gmail sessions on the same window without their sessions getting mixed up.
Finally, it's different from profiles because you can optionally associate websites to containers (e.g., if I open ycombinator.com it's opened using my Personal container while opening miro.com automatically loads a different container, while I disable this feature for sites that I login across multiple containers for different contexts, such as Gmail or the AWS Console)