Thunderbird and Firefox Zeitgeist datasources/plugins available via PPA

Zeitgeist is a powerful tool specialized in logging events, in the sense of keeping track of user's file interactions, such as opening text files, images, playing music tracks, copied folders, etc, events organized in a database from where applications, if it is a requirements, use them in useful scenarios like providing a Dashboard in Ubuntu's Gedit with most frequently used text files, last opened files in the Dash's home view, etc, bundle of actions made possible by sources/datasources/plugins provided by default by Zeitgeist in Ubuntu.

The mentioned Zeitgeist behavior is not all inclusive in Ubuntu, meaning, there are applications that, regardless of their heavy usage, remain unlogged, consequently, their specific generated tracking data is not available for other tools designed in managing logged events.

Two important apps suitable for the above description are Firefox and Thunderbird, two default solid pieces of Ubuntu, furthermore, their tracked activity can be used by numerous applications and Unity components, such as GNOME Activity Journal (Visited Websites, Emails), Unity Web History lens (visited websites with Firefox), Synapse (Thunderbird emails under All, visited websites under Internet).

Not only the users, but also the developers can take advantage of the mentioned functionalities for various applications or to-be-created software.

How do we install Firefox and Thunderbird's Zeitgeist datasources 0.4?
Add the following official PPA (Precise, Quantal)

sudo add-apt-repository ppa:markjtully/ppa

sudo apt-get update
sudo apt-get install zeitgeist-datasource-firefox zeitgeist-datasource-thunderbird

GNOME Activity Journal and Synapse are available via Ubuntu Software Center.