My patch changes the Blob to a data uri, that for this test doesn't really matter, though we would not want to hide possible bugs here. I don't know much about why a Blob in x-orig would cause the network code to bail out, my theory is related to the Blob's origin, but I don't know the network and x-orig details weel enough to go further. Do you want me to file a follow-up bug to investigate this, or is it expected?
Bug 1672238 Comment 4 Edit History
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My patch changes the Blob to a data uri, that for this test doesn't really matter, though we would not want to hide possible bugs here. I don't know much about why a Blob in x-orig would cause the network code to bail out, my theory is related to the Blob's origin, but I don't know the network and x-orig details well enough to go further. Do you want me to file a follow-up bug to investigate this, or is it expected?