"The resources at was blocked by Safe Browsing" issue in Mozilla Firefox
The Safe Browsing feature is part of Google's network, which they use to identify websites which may have come under attack, appear malicious/fraudulent etc.
e.g. when I visit the link you attached:
You likely have content on the site which is dangerous, ads which are misleading etc.
See https://support.google.com/webmasters/answer/3258249?hl=en&ref_topic=4596795 for more information.