ModHeader is a
browser extension publisher,
most of their extensions are
productivity extension and
developer tools extension.
December 8th, 2022
Map custom keywords to URLs like 'm' for Gmail, 'yt' for YouTube, 'fb' for Facebook, etc.
April 9th, 2023
Modify HTTP request headers, response headers, and redirect URLs
March 24th, 2023
Mock, modify, and replay API. Easy setup. No proxy needed. No code change required.
You could send emails to publisher, or check publisher's website.