Two reasons:

1. It deliberately replaces some versions of libraries with different versions. That's a feature I could do without.

2. The use of integrity hashes on cross-origin resources breaks Decentraleyes[0], and it's not fixable without browser changes.[1]

[0]: https://git.synz.io/Synzvato/decentraleyes/-/issues/16 [1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1419459