I just can't shake Chrome. I hate it as much as I love it. While it's a smooth, clean experience with a surprising amount of customization and a robust extension ecosystem, it's a resource hog. God forbid I need to look something up on a game's wiki while I"m playing it, because bam, my CPU is suddenly up to 99%.
I wish I could jump on the Firefox boat again, but it's just not on the same tier as Chrome.