Install Xtreme Download Manager in Ubuntu 12 04 LTS and Other Ubuntu Derivatives
Install Xtreme Download Manager in Ubuntu 12 04 LTS and Other Ubuntu Derivatives

To install Xtreme Download Manager open terminal and follow this command (Just copy and paste)
sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install xdman
To Integration with Mozilla Firefox:
http://localhost:9614/xdmff.xpi
Just copy and paste in address bar
To integration with Google Chrome:
http://localhost:9614/proxy.pac
Go to System Settings > Network > Network Proxy > Select Automatic in Method and paste following line in configuration URL (see the following image to setup).
To integration with Opera:
http://localhost:9614/proxy.pac
Goto Preferences > Advanced > Network > Proxy Servers > Check automatic proxy configuration and provide the address (see the following image to setup).
Xtreme Download Manager for download:

Special thank for http://www.noobslab.com/