The final version of Firefox 7 has been released. The official announcement will take place tomorrow.
What's new:
Optimized memory consumption and improved unloading of spent JavaScript content;
Added Azure Direct2D for Canvas;
Added support for Web timing;
Added support for CSS 3 Text-Overflow: ellipsis;
Added Telemetry feature. The new feature sends browser performance data to the developer (anonymously) for analysis to identify problems. This will help make the browser even better.