User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0
Steps to reproduce:
When downloading an Excel file, a dialog is opened asking to save or run the file with a selected application. The matching application is selected and the 'Do this automatically from now on...' checkbox is checked immediately. The application also is configured correctly in the Applications list in the options panel.
The MIME type of the downloaded file is "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet".
But this dialog should not appear, because 'Do this automatically from now on...' checkbox is already checked.
When doing the same download in Chrome, after configuring the options accordingly, the application is opened immediately.
The current Firefox behavior in my opinion is a bug and very annoying to our users.
A prompt is shown instead of directly opening the Office application.
The configuration in Options/Applications should be respected and the application should be opened immediately.
Opening the application without prompt.