Firefox 73 + Firefox 74 Beta Benchmarks On Ubuntu Linux
MotionMark benefits from Mozilla's WebRender but with Firefox 74 Beta 1 the impact was actually reduced compared to the prior releases. But even with WebRender, the performance is still a long shot from Google Chrome.
WebRender helps slightly with the StyleBench test and is performing slightly faster with Firefox 73 and Firefox 74 Beta.
There was a surprising lift in performance with Firefox 73 for the Speedometer test but pulled back slightly on Firefox 74 Beta.