The Anti-Grabify add-on prevents services such as Grabify from stealing your IP address. It currently blocks over 20 URLs from Grabify and other IP grabbing services. This add-on will prevent the sites from loading, which in return doesn't let Grabify steal your IP and send it to the person with malicious intent.
Official GitHub Page: https://github.com/Konnor88/anti-grabify
Official GitHub Page: https://github.com/Konnor88/anti-grabify
