Why it matters: Despite holding a 65% share of the global desktop-browser market share, Chrome still has a reputation for being a massive resource hog that consumes memory and battery life like there's no tomorrow. The mode kicks in automatically once the battery in a laptop or Chromebook falls to 20%, but users can set their own level for it to activate or configure the mode to enable as soon as the charger is unplugged. A leaf icon next to the address bar shows when Energy Saver mode is turned on