Modern web browsers are among the most intricate software systems in computing history. A functional browser cannot simply display markup; it must ingest network streams, tokenize and parse non-standard HTML, construct a mutable object tree, parse and cascade stylesheets, execute scripting runtimes, compute geometric layouts across multiple rendering paradigms, rasterize primitives into pixel buffers, register spatial interactions, and maintain strict process-level security boundaries.

The vast majority of modern browsers bypass this complexity by wrapping existing engines, predominantly Google’s Chromium codebase or occasionally Apple’s WebKit. Prism takes an entirely different route.

Prism is an independent, modular browser engine written from scratch in Rust. Rather than embedding an existing rendering core, Prism implements its own decoupled pipelines for resource handling, document object model creation, style calculation, display-list generation, software rasterization, and extension sandboxing.…