This is the VirusTotal Website Security Check, it is created by TheDoggyBrad Software Lab. It allows you to check the security of a website by typing in the full URL of the website (on the website) or by clicking the extension (on web browser extensions). Then it automatically opens the VirusTotal security page that shows the result of various AV-provider's hypothesis on that website., similar to the behavior of a VirusTotal API. But... this site or extension does not use an API key. Instead it is a reverse-engineering of the URL search function of the VirusTotal website. You may look at its code at https://github.com/thedoggybrad/vt_web_check
https://thedoggybrad.github.io/vt_web_check/
Update: Mozilla once again declined the extension. The reasons is that I do not have a privacy policy linked on addons.mozilla.org which I cannot figure out how to accomplish.
https://addons.mozilla.org/en-US/firefox/addon/vt_web_check/
Update: Opera is currently reviewing the extension. January 2025 Update: Opera still does not anything to the extension.
I have no plans now to upload this to Chrome WebStore in my opposition to Google's monopolistic actions on the search engine industry.
Below is the instructions on how to install it manually without the Chrome WebStore.
https://github.com/thedoggybrad/vt_web_check/releases/tag/chromium_1.12
✓A website
✓Microsoft Edge Extension
✓Chromium-family Extension (Through Extension Developer Mode)
•Firefox-family Extension (Unpublished by Mozilla)
•Opera Extension