“Firefox Lorentz takes the out of process plugins work from Mozilla Developer Previews and builds it on top of Firefox 3.6.3. This beta offers uninterrupted browsing for Windows and Linux users when a problem causes a crash in any Adobe Flash, Apple Quicktime or Microsoft Silverlight plugin instance” — I’ve been looking forward to this; Too bad Mac support for this feature will only be added in Firefox 4.0 (src)