Created attachment 8854987 [details] input_file_p7s.png User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 Build ID: 20170323105023 Steps to reproduce: We have a field for uploading files in our application, which generally works very well, but when trying to upload a file with the extension "p7s", which represents a digital signature, we had a problem. The file type is not determined by Firefox, we all have an empty string. Steps to Reproduce 1. Create an HTML with an input file 2. Select a p7s file 3. Get the information from the selected file in the Console 4. Check the file type Actual results: The file type is not determined by Firefox, all we have is an empty string. Expected results: The file type property should contain a value representing your mime type
I think your bug is a duplicate of bug 1352348 which is originally about X509 certificate. To be sure, open http://mime.ritey.com/ and upload your p7s file to read the MIME type. In Firefox, you should get "application/octet-stream" instead of " application/pkcs7-signature" like in Chrome.
I just tested in Ubuntu and everything seems to work as expected. The file type has been identified as "application / pkcs7-signature" (in the work I use Windows 8.1)
According to comment 2, set duplicate of bug 1352348.
Status: UNCONFIRMED → RESOLVED
Last Resolved: a year ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1352348
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