Firefox's Decentraleyes addon is built on a similar idea: https://addons.mozilla.org/en-US/firefox/addon/decentraleyes/ https://addons.mozilla.org/en-US/firefox

Firefox's Decentraleyes addon is built on a similar idea: https://addons.mozilla.org/en-US/firefox/addon/decentraleyes/ https://addons.mozilla.org/en-US/firefox/addon/decentraleyes... It does not work with fonts as far as I'm aware, but it can serve popular libraries locally, saving bandwidth, and protecting privacy.