MozillaFirefox-branding-openSUSE: move Firefox specific prefs to defaults/preferences

Various updates to MozillaFirefox-branding-openSUSE:

- move Firefox specific prefs to defaults/preferences (bnc#774914)

- update susefox to snapshot 20120626
* add window controls for Gnome 3 (bnc#768942)

- bumped version to 6.0
- support firefox-esr RPM packages
- removed MozillaFirefox build dependency and PreReq
* everything controlled by Supplements and Requirements from
base package

- make openSUSE software search version specific (bnc#737709)

Fixed bugs
bnc#774914
Firefox specific prefs need to be moved out of defaults/pref
bnc#768942
manage content plugins window (openSUSE addon) has no close button
bnc#737709
Make the "openSUSE package search" engine search for distro version relevant packages
Selected Binaries
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