Complex sentence: Version 3.5 was touted as being twice as fast as 3.0 (thanks to its TraceMonkey JavaScript engine and rendering improvements), includes private browsing, has tear-off tabs, and uses the Gecko 1.9.1 engine.
Split into simpler sentences: Version 3.5 was touted as being twice as fast as 3.0 (thanks to its TraceMonkey JavaScript engine and rendering improvements). It includes private browsing, has tear-off tabs, and uses the Gecko 1.9.1 engine.