ack vs Chromium

ack has no write-up on Specifiction yet; its figures are above.

Chromium is a free, open-source browser project and codebase for developers who build, study, and contribute to it. The project publishes source code, design and architecture documents, testing information, and contribution guidance. It develops the V8 JavaScript engine and Blink rendering engine. Its documented security approach includes sandboxing, Safe Browsing, defense in depth, and safe defaults, with a security team reviewing architecture and helping address bugs. Chromium source code is released under a permissive BSD license, and Google uses the project as the basis for Google Chrome. Build instructions cover Windows, Mac, Linux, iOS, and Android; download archives list Mac, Windows, Linux, and ChromiumOS. Builds are supplied on a best-effort basis from arbitrary revisions, may differ from user-facing Chrome releases, do not auto-update, and do not include symbols. Site Isolation can increase memory use and has stated Android limitations.