Hi, I'm Robinson, and I’m happy to help you today.
I know how frustrating this may be for you but I'll do my very best to help you.
I found this thread on the Google Chrome forum and looks like it is not a browser feature, but it is created by the extension "Diigo Web Collector extension". Uninstalling this extension should remove this feature. You can see more information at this link.
https://support.google.com/chrome/thread/177992...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products).