You can’t knock a solid update.

On Tuesday, Mozilla.org released version 18.0 of its Firefox web browser. The new version, a 38.4 megabyte download and adds the following fixes and changes:

New:
- Faster JavaScript performance via IonMonkey compiler.

- Support for Retina Display on OS X 10.7 and up.

- Preliminary support for WebRTC.

Changed:
- Experience better image quality with our new HTML scaling algorithm.

- Performance improvements around tab switching.

Developer:
- Support for new DOM property window.devicePixelRatio.

- Improvement in startup time through smart handling of signed extension certificates.

HTML 5:
- Support for W3C touch events implemented, taking the place of MozTouch events.

Fixed:
- Disable insecure content loading on HTTPS pages (62178).

- Improved responsiveness for users on proxies (769764).

Firefox 18.0 requires an Intel-based Mac running Mac OS X 10.6 or later to install and run.

If you’ve tried the new version and have any feedback to offer, please let us know in the comments.