Been binging on some c3 downloads and ran into this issue today.
Appears to be a rule on *.storage.arubacloud.co.uk domains. C3 is using Aruba Cloud as their filehost. Likely being caused by some other malicious host on arubacloud’s network.
The security block can be disabled in Firefox via:
Menu -> Options -> Privacy & Security tab -> uncheck ‘Block dangerous and deceptive content’.
Then you should be able to download whatever you want without issues. I’d recommend re-enabling the option once you’re finished your C3 download(s).
