Security update for MozillaFirefox (important)

This update for MozillaFirefox to ESR 52.3 fixes several issues.

These security issues were fixed:

• CVE-2017-7807 Domain hijacking through AppCache fallback (bsc#1052829)
• CVE-2017-7791 Spoofing following page navigation with data: protocol and
  modal alerts (bsc#1052829)
• CVE-2017-7792 Buffer overflow viewing certificates with an extremely
  long OID (bsc#1052829)
• CVE-2017-7782 WindowsDllDetourPatcher allocates memory without DEP
  protections (bsc#1052829)
• CVE-2017-7787 Same-origin policy bypass with iframes through page
  reloads (bsc#1052829)
• CVE-2017-7786 Buffer overflow while painting non-displayable SVG
  (bsc#1052829)
• CVE-2017-7785 Buffer overflow manipulating ARIA attributes in DOM
  (bsc#1052829)
• CVE-2017-7784 Use-after-free with image observers (bsc#1052829)
• CVE-2017-7753 Out-of-bounds read with cached style data and
  pseudo-elements (bsc#1052829)
• CVE-2017-7798 XUL injection in the style editor in devtools (bsc#1052829)
• CVE-2017-7804 Memory protection bypass through WindowsDllDetourPatcher
  (bsc#1052829)
• CVE-2017-7779 Memory safety bugs fixed in Firefox 55 and Firefox ESR
  52.3 (bsc#1052829)
• CVE-2017-7800 Use-after-free in WebSockets during disconnection
  (bsc#1052829)
• CVE-2017-7801 Use-after-free with marquee during window resizing
  (bsc#1052829)
• CVE-2017-7802 Use-after-free resizing image elements (bsc#1052829)
• CVE-2017-7803 CSP containing ‘sandbox’ improperly applied (bsc#1052829)