Why do I must complete a CAPTCHA?
Completing the CAPTCHA proves you’re a human and provides you temporary usage of the net property.
So what can I do to avoid this later on?
In case you are on an individual connection, like in the home, it is possible to run an anti-virus scan on your own device to ensure it isn’t infected with malware.
In case you are at an office or shared network, it is possible to ask the network administrator to perform a scan over the network searching for misconfigured or infected devices.
Another solution to prevent getting this site later on is by using Privacy Pass. Browse the browser extension in the Firefox Add-ons Store.