Yeah, sorry, I didn't mean to imply it was a marketing site. But there was marketing surrounded it, and I distinctly remember it being used to show that they were, indeed, as fast as the other browsers. I remember a narrative being that the problem wasn't Firefox being slow, but FF being slow in certain perceived-speed areas (like new tab speed).
That's why I find these sorts of announcements confusing, I can remember them saying that there are already as fast as Chrome several times in the past. But maybe my mind is playing tricks on me.
They'd declare that the JS engine was just as fast (or faster) - but that didn't cover the whole of the UI, and laggy bits of the UI could slow things down no matter how fast the JS engine was.
Thankfully they now seem to have improved the whole UI.
That's why I find these sorts of announcements confusing, I can remember them saying that there are already as fast as Chrome several times in the past. But maybe my mind is playing tricks on me.