# Issue We created a web site that uses resources from [cdnjs][1]. This site has been live for a couple of months but we have sporadic issues with resources from this CDN and `FireFox`. * The error in the console for each script/style CDN resource is: > None of the "sha256" hashes in the integrity attribute match the content of the subresource. * The error message in the network tab for each resource is: > The connection used to fetch this resource was not secure Resources that I have had issues with include these elements (as they appear in our web page): ## Steps to reproduce You can reproduce the problem with one of the above URLs and place it directly in the URL of the FireFox browser. The resource should load in the browser window but after pressing `CTRL+F5` at least one time (could be up to 5 times) an error will appear. I can duplicate this from multiple PCs although we are located in the Netherlands so maybe a timing issue or something similar (beyond my expertise)? This does not happen with any other resources from other CDNs that we are using like the following resources: ### My environment: * Windows 10 Pro 64bit patched to latest * FireFox 60.0.1 (64-bit) ## My question Is this an issue that is specific to [cdnjs][1], is this an issue with `FireFox`, or is this an issue with how we are requesting the resource? ---- As a side note we also regularly test our software on `Google Chrome`, `MS Internet Explorer 11`, `MS Edge`, and `Opera` and have never experienced this problem on these browsers (or any other for that matter). As mentioned above this only occurs with resources requested from the [cdnjs][1] site. I have already [created a post][2] on Mozilla's forum but the response was that this is out of scope with a recommendation to post it on [stack overflow][3] or submit an issue on GitHub (*which is what this is*). [1]: https://cdnjs.com/ [2]: https://support.mozilla.org/en-US/questions/1218975 [3]: https://stackoverflow.com/q/50523151/1260204 --- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/58817826-firefox-none-of-the-sha256-hashes-in-the-integrity-attribute-match-the-content-of-the-subresource?utm_campaign=plugin&utm_content=tracker%2F32893&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F32893&utm_medium=issues&utm_source=github).

FireFox - None of the "sha256" hashes in the integrity attribute match the content of the subresource #12792

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