- Open view the raw code for vaccheck.js.
- Select all (ctrl + a)
- Copy (ctrl + c)
- Bookmark this (or any) page.
- Right click your new bookmark and edit it. In the URL or Location field, paste the contents of vaccheck.js. You can rename the name too.
- Navigate to your friends recently played with page. (You could probably bookmark that too ๐)
- Click the bookmarklet and it will use the Steam API to get a list of VAC bans for those users on that page.
All credits go out to iEyepawd from this reddit post. I merely took what he had and removed the jQuery and made it a bookmarklet.