Does Vivaldi or the underlying Chromium support Subresource, which just became a W3C standard?
Ref. "Subresource Integrity" (W3C Recommendation 23 June 2016) https://www.w3.org/TR/2016/REC-SRI-20160623/ Google Chrome and Firefox has supported Subresource since last year, but not sure if the underlying Chromium framework supports it, or Vivaldi itself? ("This specification defines a mechanism by which user agents may verify that a fetched resource has been delivered without unexpected manipulation.")
Yes, test it yourself at https://googlechrome.github.io/samples/subresource-integrity/index.html