Jogging/Running outside and even indoors using a treadmill. Instead, i like walking outside and hiking, and within the gym, I like the crosstrainer and rower.
I started using Firefox since the beginning of this year, and frankly surprised by how smooth it is. All browsers being fairly similar, I would rather use Firefox.
Partly for my own tracking in the future, and partly to see what other people think of those items/services too.