https://hacks.mozilla.org/2015/09/subresource-integrity-in-firefox-43/?ref=troyhunt.com
Do not let your CDN betray you: Use Subresource Integrity - Mozilla Hacks - the Web developer blog
Mozilla Firefox Developer Edition 43 and other modern browsers help websites to control third-party JavaScript loads and prevent unexpected or malicious...
use subresource integritythe webdeveloper blogletcdn