To install xul-ext-lightbeam just follow these instructions.
sudo apt-get install xul-ext-lightbeam
Which will install xul-ext-lightbeam and any other packages on which it depends.
|Maintainer||Debian Mozilla Extension Maintainers <email@example.com>|
|Description||visualize sites that may be tracking you around the internet collecting information about your browsing activity, with and without your consent. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit. This extension is created by Mozilla Foundation.|