How can it be possible for an Electron based browser to be faster / more efficient / battery-friendlier than the other mainstream ones?
Sounds like bullshit. We need to see some benchmarks.
Even if you have the simplest tab unloading strategy (like Tab suspender) built in, you'd beat Chrome. But, unloading tabs isn't a safe thing to do in web-standard browsers but fine in niche consumer ones.
Its not really word-smithing either, in all practical ways that matter to the end user, something like tab suspension makes it a much more efficient browser. Even if the JS/rendering (engine) bits are the same speed.
Although, to be fair, I'm not sure if Min does this, the chromium browser I made does.
Or is it private?
You will then have to restart Chrome and enable the feature in settings.
more details here: https://bgr.com/tech/how-to-use-chromes-new-energy-and-memor...
I've heard good things about this extension (but use at your own risk, I don't install extensions besides uBlock myself):
https://chrome.google.com/webstore/detail/tab-suspender/fiab...