There's the firefox addon Decentraleyes https://github.com/Synzvato/decentraleyes https://github.com/Synzvato/decentraleyes which is trying to solve those probl

There's the firefox addon Decentraleyes https://github.com/Synzvato/decentraleyes https://github.com/Synzvato/decentraleyes which is trying to solve those problems, currently only the most common versions of each library are bundled, but there are plans to create more flexible bundles. There's no reason to hit the webserver with an If-modified when the libraries already include their version in the path.