Gmail to Wikipedia URL Codes – How to Prevent Added Codes

gmailurlwikipedia

What are these numbers and codes that are added to each my Wikipedia link when I click it in Gmail:

enter image description here

Who is responsible (who is tracking me — Gmail or Wiki)? How to prevent it?

Best Answer

source/ust/usg are Gmail's tracking parameters which are applied to every outgoing link. If you inspect the email, you'll see the <a> tag has a data-saferedirecturl property containing this link. There are various tools to remove it, e.g. the URL tracking stripper Chrome extension.