Engines used in browser
Layer Browser engines contain a JS engine.
JS engine Chrome, Chromium, Edge: V8 written in C++ Safari: JavaScriptCore FireFox: SpiderMoney IE: Chakra Browser engine a.k.a layout engine, rendering engine.
Browser Browser engine Chrome Blink. Written in C++, V8 inside Safari Blink. Written in C++, V8 inside Edge Blink. Written in C++, V8 inside Opera Blink. Written in C++, V8 inside Safari Webkit Firefox Gecko Node.