MozillaFirefox: Update to version 15 (critical)

Mozilla Firefox, Thunderbird, xulrunner, seamonkey 15.0
update (bnc#777588)

• MFSA 2012-57/CVE-2012-1970 Miscellaneous memory safety
  hazards
• MFSA
  2012-58/CVE-2012-1972/CVE-2012-1973/CVE-2012-1974/CVE-2012-1
  975
  CVE-2012-1976/CVE-2012-3956/CVE-2012-3957/CVE-2012-3958/CVE-
  2012-3959
  CVE-2012-3960/CVE-2012-3961/CVE-2012-3962/CVE-2012-3963/CVE-
  2012-3964 Use-after-free issues found using Address
  Sanitizer
• MFSA 2012-59/CVE-2012-1956 (bmo#756719) Location object
  can be shadowed using Object.defineProperty
• MFSA 2012-60/CVE-2012-3965 (bmo#769108) Escalation of
  privilege through about:newtab
• MFSA 2012-61/CVE-2012-3966 (bmo#775794, bmo#775793)
  Memory corruption with bitmap format images with
  negative height
• MFSA 2012-62/CVE-2012-3967/CVE-2012-3968 WebGL
  use-after-free and memory corruption
• MFSA 2012-63/CVE-2012-3969/CVE-2012-3970 SVG buffer
  overflow and use-after-free issues
• MFSA 2012-64/CVE-2012-3971 Graphite 2 memory corruption
• MFSA 2012-65/CVE-2012-3972 (bmo#746855) Out-of-bounds
  read in format-number in XSLT
• MFSA 2012-66/CVE-2012-3973 (bmo#757128) HTTPMonitor
  extension allows for remote debugging without explicit
  activation
• MFSA 2012-68/CVE-2012-3975 (bmo#770684) DOMParser loads
  linked resources in extensions when parsing text/html
• MFSA 2012-69/CVE-2012-3976 (bmo#768568) Incorrect site
  SSL certificate data display
• MFSA 2012-70/CVE-2012-3978 (bmo#770429) Location object
  security checks bypassed by chrome code
• MFSA 2012-72/CVE-2012-3980 (bmo#771859) Web console
  eval capable of executing chrome-privileged code

• fix HTML5 video crash with GStreamer enabled (bmo#761030)
• GStreamer is only used for MP4 (no WebM, OGG)
• updated filelist
• moved browser specific preferences to correct location