Appnr is a Web-based tool and a service that install applications on Ubuntu. Application install from Appnr is always latest version in repositories.
AptURL is required
The AptURL Protocol Handler and a Web browser support are required to install applications. The AptURL Protocol Handler is a program that handles special URLs to installing software on APT-based Linux systems. Ubuntu 7.10 or higher can use AptURL by default.
Please install the package “apturl” if using APT-based Linux systems like Debian, Linux Mint, PCLinuxOS.
Install from Synaptic Package Manager
Go to Synaptic Package Manager and find “apturl”.
When you have found it check it and click on “Apply Changes”.
Install from Terminal
Type:
$sudo apt-get install apturl