Duplazy

Duplazy is an extension to automatically duplicate commonly used characters such as brackets and quotations t ospeed up your typing and give you a familiar typing experience to developer environments with

When enabled allows users to specify what characters they want Duplazy to automatically add the corresponding closing character.
Similar to how most IDEs will handle this, simply use the options page to pick which of the supported characters you want to opt in, and Duplazy will handle the rest while you type, adding the character and placing the typing cursor in between the characters.

Current supported character pairings are ( ), { }, [ ], " ".