What are the safety issues of using the google inspect console?

Answer 1

I don't think there should be any since the browsers' console can execute and/or modify only the client-sided scripts like JavaScript which has no effect to the server at all, unlike the server-sided scripts like PHP.

Answer 2

Okay. I was told that on some sites it could be possible for someone to receive my session ID, and i know a lot of sites that warn against it. Is this true?

Answer 3

hashed and salted key?

Answer 4

Yeah, take a look at these:
https://en.m.wikipedia.org/wiki/Cryptographic_hash_function
https://en.m.wikipedia.org/wiki/Salt_(cryptography)
It's better than simply encrypting with static key since there is, very less usually, chance of someone getting the key.