Security update for Mozilla Firefox (important)

Mozilla Firefox was updated to 49.0.2 to fix two security issues and some
bugs.

  The following vulnerabilities were fixed:

  * CVE-2016-5287: Crash in nsTArray_base (bsc#1006475)
  * CVE-2016-5288: Web content can read cache entries (bsc#1006476)

  The following changes and fixes are included:

  * Asynchronous rendering of the Flash plugins is now enabled by default
  * Change D3D9 default fallback preference to prevent graphical artifacts
  * Network issue prevents some users from seeing the Firefox UI on
    startup
  * Web compatibility issue with file uploads
  * Web compatibility issue with Array.prototype.values
  * Diagnostic information on timing for tab switching
  * Fix a Canvas filters graphics issue affecting HTML5 apps