Microsoft is fighting about browser battery life with Google again

Battery life is an inherently squishy topic. It's hard to be precise when measuring, because there are so many variables at play. That said, battery life is hugely important, and it's worth optimizing anything that can be optimized to get more hours and minutes out of our laptops. Specifically, browsers are huge RAM hogs that drain most of a laptop's battery on a given day, and the major vendors are aware of this.
What does all this mean? More bakeoffs!
We were treated to an entertaining back-an