Firefox 4 RC1 Released

IgnitusBoyone writes "Mozilla has now released Firefox 4 RC1. For most beta participants the update should be automatic, but for those holding out until it gets closer to feature freeze, now is likely a good time to test the next major release. Aside from a complete redesign of the user interface, Firefox 4 offers several new features (release notes) including an integrated sync manager, improved methods for tab-switching and organization for tab-heavy users."