Manu Cornet is a
browser extension publisher,
most of their extensions are
August 6th, 2021
Tile your windows with a single click.
January 6th, 2016
Allows you to change the color of your Gmail favicon to make it easier to distinguish between accounts.
September 13th, 2022
Makes it easier to ask for a code review
November 8th, 2022
Makes it easier to download message files from the Gmail UI
You could send emails to publisher.