Does what it says with no malicious behavior. I'm a software engineer and cybersecurity consultant. Personally downloaded and reviewed the source code then tested in browser. Works perfect and is safe! Literally just adds a search provider using the extension manifest, doesn't have scripts or anything else.

This addon is entirely unnecessary. Simply follow the guide here to add Brave search to your browser: https://search.brave.com/default

Nice.
Though, i do have a question, is it safe and or official?

Very safly and good