/usr/share/app-install/desktop/xombrero:xombrero.desktop is in app-install-data 15.10.
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 18 | [Desktop Entry]
X-AppInstall-Package=xombrero
X-AppInstall-Popcon=3
X-AppInstall-Section=universe
Name=xombrero Browser
Comment=Minimalist's Web Browser
Keywords=web;internet;http;www;
Terminal=false
Type=Application
Version=1.0
Icon=_usr_share_xombrero_xombreroicon64
Exec=xombrero %u
StartupNotify=false
Categories=Application;Network;
MimeType=text/html;text/xml;application/xhtml+xml;application/vnd.mozilla.xul+xml;text/mml;
X-Ubuntu-Gettext-Domain=app-install-data
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