"Add Mercer Intl. MS tags on Amazon" is a Chrome extension developed by Keith Harrison in the Browsers category under Add-ons & Tools. This extension automatically inserts Asa Mercer International Middle School PTSA affiliate tags when visiting Amazon, ensuring a small percentage of each purchase (4% for most items) goes to support PTSA programs. It seamlessly adds the Mercer affiliate tag to Amazon URLs in the background, allowing users to effortlessly contribute to the PTSA without manual intervention.

This extension streamlines the process of supporting the PTSA every time you shop on Amazon, eliminating the need to start from specific links or bookmarks. It intelligently redirects users to the regular Amazon website instead of Amazon Smile to maximize revenue for the PTSA, ensuring continuous support with no additional cost to the user.