Google says it's making Chrome less of a battery and memory hog
 

Google is rolling out two new modes for Chrome that are designed to make the browser less of a drain on your system's battery and memory. It says that, with the Memory Saver mode, Chrome will reduce its memory usage by up to 30 percent on desktop. The mode frees up memory from open tabs that you aren't using. Google says this will help to give you a smoother experience on active tabs. Chrome will reload inactive tabs when you switch back to them.

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