OpenDownload: Add a run option to the Firefox Download dialog
OpenDownload is a Firefox add-on that adds a run option. When you select "Run," the file will be downloaded to a temp directory and then launched. 24 hours after the file is downloaded, it will be automatically deleted it.
Aside from keeping your download directory clean, the main benefit of the Run box is that you can now download and run files with a single click instead of two clicks, thus saving you a valuable fraction of a second.