This bug still affects firefox 40, I checked with the network tab, firefox is sending
Content-Disposition: form-data; name="file_0"; filename="xxxx.pdf" Content-Type: application/empty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/84880 Title: firefox uploads files with wrong mimetype To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/84880/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs