If we run all of our code in the same process, exploiting one part can lead to code execution all over the browser. But why are they all needed?įirst of all, for security reasons. One of the most commonly known facts about Chromium based browsers is that they have lots of processes. There are other types of plugins supported, we will cover some of them later on. In Chromium, extensions run in their own process. They allow adding capabilities to the web platform by third parties. Built mostly with web technologies such as HTML, CSS, JavaScript, etc. Extensions - Software plugins for the web browser.Implemented differently per operating system. Usually implemented by restricting process privileges via operating system features. Sandboxing - The concept of isolating and limiting a component.Used for communication between the different processes and components of the browser. Mojo - Chromium’s IPC (Inter Process Communication) system.Some APIs are exposed globally across the browser, some are limited to specific components (e.g. Chrome API - JS events and functions that the browser exposes.V8 - The JavaScript engine used in Chromium.Renderer - Usually refers to a process running the rendering engine.It was forked from Apple’s WebKit in 2013. Blink - The rendering engine used in Chromium.It takes the tags and implements their behavior.

Rendering Engine - The component responsible to parse and transform HTML to what we see as web pages.

Browsers built on chromium