/usr/share/kde4/services/plasma-widget-facebook.desktop is in plasma-widget-facebook 1.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | [Desktop Entry]
Encoding=UTF-8
Name=Facebook
Type=Service
ServiceTypes=Plasma/Applet
Icon=applications-internet
X-Plasma-API=python
X-Plasma-MainScript=code/main.py
X-KDE-PluginInfo-Author=Ferenc Nagy
X-KDE-PluginInfo-Email=nferencfx@gmail.com
X-KDE-PluginInfo-Name=facebook
X-KDE-PluginInfo-Version=1.0
X-KDE-PluginInfo-Website=http://plasma.kde.org/
X-KDE-PluginInfo-Category=Internet
X-KDE-PluginInfo-Depends=
X-KDE-PluginInfo-License=GPL
X-KDE-PluginInfo-EnabledByDefault=true
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