Mozilla Firefox 33 was just released and we added it to Browserling already. You can already cross-browser test your websites and code in Firefox 33!

Cross-browser testing in Firefox 33

Try Firefox 33 in Browserling now!

The new Firefox 33 features include:

  • OpenH264 support (sandboxed).
  • Improved search experience through the location bar.
  • Windows: OMTC enabled by default.
  • Slimmer and faster JavaScript strings.
  • Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages.
  • Support for connecting to HTTP proxy over HTTPS.
  • New CSP (Content Security Policy) backend.
  • Improved reliability of the session restoration.
  • Azerbaijani [az] locale added.

Firefox 33 biggest changes include:

  • JSD (JavaScript Debugger Service) removed in favor of the Debugger interface.
  • Proprietary window.crypto properties/functions removed.

Firefox 33 HTML5 updates include:

  • DOMMatrix interface implemented.
  • @counter-style rule from CSS3 Counter Styles specification implemented.

Firefox 33 developer tool updates include:

  • Cubic-bezier curves editor.
  • Paint flashing for browser content repaints.
  • Display which elements have listeners attached.
  • New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet.
  • Editable @keyframes rules in the Rules section of the Inspector
  • CSS transform highlighter in the style-inspector.

Firefox 33 fixes include:

  • Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers.

Firefox 33 security fixes include:

  • Accessing cross-origin objects via the Alarms API.
  • Inconsistent video sharing within iframe.
  • Key pinning bypasses.
  • Use-after-free interacting with text directionality.
  • Further uninitialized memory use during GIF rendering.
  • Out-of-bounds write with WebM video.
  • Web Audio memory corruption issues with custom waveforms.
  • Buffer overflow during CSS manipulation.
  • Miscellaneous memory safety hazards (rv:33.0 / rv:31.2).

Happy cross-browser testing!