Security update for Mozilla Firefox (important)

MozillaFirefox has been updated to the 17.0.4ESR release
which fixes one important security issue:

• MFSA 2013-29 / CVE-2013-0787: VUPEN Security, via
  TippingPoint’s Zero Day Initiative, reported a
  use-after-free within the HTML editor when content script
  is run by the document.execCommand() function while
  internal editor operations are occurring. This could allow
  for arbitrary code execution.