How Browsers Work: Behind the scenes of modern web browsers

1. Introduction
2. The Rendering Engine
3. Parsing And DOM Tree Construction
   • Parsing General
   • HTML Parser
   • CSS Parsing
   • The Order of Processing Scripts and Style Sheets
4. Render Tree Construction
   • The Render Tree Relation to The DOM Tree
   • The Flow of Constructing The Tree
   • Style Computation
5. Layout
6. Painting
7. Dynamic changes
8. The Rendering Engine's Threads

Sources

• How Browsers Work: Behind the scenes of modern web browsers - HTML5 Rocks
• Kruno: How browsers work | JSUnconf 2017 - YouTube