Determine the shopping domain name and raise a warning when there are user concerns.
This extension analyses the current visited site for its hostname and existence on the list https://www.coi.cz/pro-spotrebitele/rizikove-e-shopy/. One the hostname is on the list you'll get a notification on the page. Then follow the link and read what others says.
This extension is dedicated to browsers based on the open-source Chromium codebase, e.g. Chrome, Brave, Edge, Opera, and many more.
The link uses "Scroll To Text Fragment" feature to allow browser to highlight domain on the page.