if you want to see all settings Reddit keeps for you (e.g. account age in milliseconds, advertisement secret keys, user id etc), you can type r.config in the browser console.

I learned that Reddit is using Matrix for its chats?

I tried changing variables like debug to true, but didn’t work. all other Reddit internal functions are under r, so looking around you see a lot of interesting stuff, like the local storage and how it gets encrypted (with the key from r.config).