Adding Firebase data, dots and forward slashes

Question

I try to use firebase db, I found very important restrictions, which are not described in firebase help or FAQ.

First problem is that symbol: dot \'.\' prohibited in

Answer 1

Even though it is not what OP asks,
but in my experience rather than using such dubious keys it is better to let .push() create an id,
and other things - e-mail, date etc. save as content of the dedicated fields.

$id: {
   email: "Henry.Morgan@caribbean.sea"
}

P.S. Don't try to save volume by inserting what should be content into the key.
Premature optimization is the root of all evil (c).