HTTP Subresource Integrity in Browsers

Firefox now supports validating subresources by their hash, like this:

<script src="https://code.jquery.com/jquery-2.1.4.min.js"
integrity="sha384-R4/ztc4ZlRqWjqIuvf6RX5yb/v90qNGx6fS48N0tRxiGkqveZETq72KgDVJCp2TC"
crossorigin="anonymous"></script>

https://hacks.mozilla.org/2015/09/subresource-integrity-in-firefox-43/

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