Some interesting optimizations in here, but I'm curious about this one in particular: > With the Anniversary Update, Microsoft Edge only executes background JavaScript timers once per second in background tabs. More importantly, these timers are coalesced with other work happening across Windows. Microsoft Edge doesn’t wake up the hardware to perform work. Instead we tag along with other work happening across the sys…
In Safari, which slows background JavaScript down or stops it altogether, music stops playing occasionally on Soundcloud when a song ends. The only option to prevent this is to make the Soundcloud tab the sole tab in the browser window. The window can be in the background but the tab is not treated as background tab because it is the active tab in the window.
To keep a tab active pin it, those tabs will be immune from that.
And not for power consumption but simply for browser speed!