I understand that changing the file extension of downloads to match the file contents is a protection feature but it is causing me issues on mobile. I am trying to download .rosz files, they are essential .zip files with a custom extension. These files are generated from one web app and are going to be uploaded into another web app and the receiving app will reject files with the wrong extension. The current behavior changes the file to .zip and requires me to manually locate the downloaded file and rename it back to .rosz . Is there a setting that I can change to prevent download file extention renaming? I understand the security issues it can present and am willing to accept the risks. I'm on the android version of firefox.