Firefox Flashgot Plugin

Install Flashgot.

Open your addon pages in firefox:

then click on preferences and click add write Persepolis Download Manager and select this file for executble path (in linux):

    /usr/bin/persepolis

On Mac:

    /Applications/Persepolis Download Manager.app/Contents/MacOS/Persepolis Download Manager 

then in the white field copy/paste the following codes:

    [--link URL][--name FNAME][--referer REFERER][--headers HEADERS][--agent UA][--cookie COOKIE]

then at the end click on the advance tab and uncheck automatic download manager detection

and on media tab select Persepolis Download Manager

uncheck this too!

then Click OK and enjoy!! you can use flashgot for download from youtube , ...