: In the General panel, scroll down to the Files and Applications section and look for the Applications list.
: Search for the specific file type you want to change (e.g., "PDF" or "JPEG"). open file instead of download firefox
If you can’t find the specific file format in the Applications list, Firefox hasn’t registered a default action for it yet. You can force it to appear by: : In the General panel, scroll down to
: Click the drop-down menu in the Action column next to the file type: : In the General panel