>>akyuu+(OP)
I've used Firefox as my primary browser since the "Quantum" in 2017. Chrome still feels snappier, but Firefox's Container Tabs is hard for me to imagine losing.
>>rewmie+y6
That's the one! I thought it was an inbuilt feature of the browser. I guess the Facebook Container[1] extension must bring it down as a dependency or something, because I have never installed that extension knowingly.