A "share cache if hashes match" approach was considered with https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity https://developer.mozil

A "share cache if hashes match" approach was considered with https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity https://developer.mozilla.org/en-US/docs/Web/Security/Subres... but not included in the initial version. There's been talk (https://hillbrad.github.io/sri-addressable-caching/sri-addressable-caching.html https://hillbrad.github.io/sri-addressable-caching/sri-addre... , https://github.com/w3c/webappsec-subresource-integrity/issues/22 https://github.com/w3c/webappsec-subresource-integrity/issue...) about allowing sites to opt in, but then you're opening up a new way of tracking users across sites.