LF extensive list of communication channels

After I started actively reading Mozilla’s docs I noticed that it’s hard to find a proper place to ask about stuff. MDN is unhelpful in that regard and communication channels are generally scattered, uncategorized & poorly doсumented.
For example, only after submitting a bug report about AMO to Bugzilla I found out that despite having a dedicated sections, such reports should be directed to GitHub instead.
I would like some list of Mozilla’s active communication channels, preferably with a short description of what they are dedicated to.