All that means is that you've opted out of the web that the rest of the world is using. Good for you. But people who have disabled JS make up such a small porportion of web users (~.2% of pageviews) that your experience is pretty much irrelevant to the question of general browser trends.
I'd also bet that Chrome was faster at painting pages than Firefox, so it wasn't just a JS engine advantge.
That may very well have been true, but if Chrome spends 10 cycles rendering the page and 100 cycles executing malware, and Firefox spends 20 cycles rendering the page and zero cycles executing malware, Chrome still loses despite being being twice as fast at the only thing that matters.
0: unless you count monitors as TVs, or disassembly-for-parts as use.
Alternatively, it could mean that, like me, they had NoScript installed when Chrome came out[0], making Firefox genuinely faster by dint of brute do-less-stuff-ism.
0: or when we heard about it anyway.