Version History of Firefox 31.0

  • Add the search field to the new tab page
  • Support of Prefer:Safe http header for parental control
  • mozilla::pkix as default certificate verifier
  • Block malware from downloaded files
  • Partial implementation of the OpenType
  • audio/video .ogg and .pdf files handled by Firefox if no application specified (Windows only)
  • Upper Sorbian [hsb] locale added
  • Removal of the CAPS infrastructure for specifying site-specific permissions (via capability.policy.* preferences). Most notably, attempts to use this functionality to grant access to the clipboard will no longer work. The sole exception is the checkloaduri permission, which may still be used as before to allow sites to load file:// URIs
  • WebVTT implemented and enabled
  • CSS3 variables implemented
  • Developer Tools: Add-on Debugger
  • Developer Tools: Canvas Debugger (learn more)
  • New Array built-in: Array.prototype.fill() (learn more)
  • New Object built-in: Object.setPrototypeOf() (learn more)
  • CSP 1.1 nonce-source and hash-source enabled by default
  • Developer Tools: Eyedropper tool added to the color picker (learn more)
  • Developer Tools: Editable Box Model (learn more)
  • Developer Tools: Code Editor improvements (learn more)
  • Developer Tools: Console stack traces (learn more)
  • Developer Tools: Copy as cURL (learn more)
  • Developer Tools: Styled console logs (learn more)
  • navigator.sendBeacon enabled by default (learn more)
  • Dialogs spawned from the onbeforeunload event no longer block access to the rest of the browser
  • Search for partially selected link text from context menu (985824)