[FEATURE] Support firefox containers

[N1N74]

Browser

Chrome, Firefox

OS

Win

Feature Description

1. Support Firefox containers
2. More fine tuned metric to track usage. For example, people using multiple youtube accounts across different containers can block the fun account after time limit while allowing college account to watch lectures.

[sheepzh]

@N1N74 hi, could you give me more details? like how to define a unique key of container tracking? I'm trying to learn about the API, but I have no idea about the feature details.