First of all, I’d recommend not touching networking if you have no clue what you are doing. It is a complex task and easy to get wrong.
Secondly, you didn’t provide context so it is not possible to help you. You tell me how do I make a
specific browser extension work without knowing what browser or extension I used 
At last, I’d have a potential solution for you: the firebase extension. It is in currently being finalized (last small fixes, documentation and official example WIP), and you can already try it here: Is Firebase possible? and if...How? - #2 by arthuro555