I assume this is related to bug 1656296. Having said that, download seems to work fine on macOS (20200824215021), so it might be Windows only?
Bug 1660952 Comment 3 Edit History
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I assume this is related to bug 1656296. Having said that, download in bug 1660957 seems to work fine on macOS (20200824215021), so it might be Windows only? The link in comment 0 here gives me a blank page, and another error in console ``` NS_ERROR_FAILURE: Can't use PDF.js ```