Many a times it so happens that you wanted to start a download in Firefox but could not because of some work. So what most of us do is bookmark the link and download it later. Now if you ever wished to download files later or could have just schedule it like it can be done in Download Managers, your wish has come true with the Download Scheduler Extension.
To make use of this extension, instead of clicking on executable to download directly, you should right-click and select Schedule link as. This will create a dummy file and start downloading according to the set time.
Now the set time by default is 2 Am and gives an option to pause the download at 8 Am. This time must have been picked for users who have free download during night. This can be changed from the options in the extension.
Download this extension from here | Via Addictive Tips