Set firefox default to download file

Not set by default; set after the user configures their download options. browser. download. dir String The last directory used for saving a file from the "What should (browser) do with this file?"

6 Nov 2019 Firefox Extension Workshop. Make the web do what you want. By default, the user will be asked to approve the installation, and if the user The signed add-on file you downloaded from AMO will be named something like  (MIME types are not shown by default. Select a file type entry and click 'Change Action' You cannot add new file types to the Download Actions listing in Firefox, as you can in Mozilla