It’s great that FF is now faster but how’s battery life in this new engine? The reason I stuck with safari and only a year ago moved to chrome was that google finally was able to drastically improve battery life on chrome for Mac... where is FF here (their release page doesn’t mention “battery” at all), does anyone know?
Well, I'm running it on a 7-year-old Mac mini (yeah, no battery, I know, but hold on...), and _idle_ Firefox, without focus, is ticking along at 0.7-1.5% CPU time. Safari is zero . Dead still. I type this and it moves to 0.3%. No idea what Firefox is doing... edit: Also, even without focus, Firefox climbs to 8.9% CPU just by hovering my mouse over it. Safari goes to 0.2%.
youtube.com: Firefox ~6%, Safari ~0%
news.ycombinator.com: 0%, ~0%
amazon.com: ~2%, ~2%