gecko-dev/devtools/docs/getting-started
..
README.md
architecture-overview.md
build.md
development-profiles.md
where-is-the-code.md

README.md

Getting started

  1. Learn where the code is and about the architecture of the tools.
  2. Set up your machine to build the tools, then configure a development profile.
  3. You can now experiment by changing things and rebuilding, look at the files and directories overview or you could also find something to work on.

Additional documentation

  • MDN Web Docs (also known as MDN) has a lot of information about XUL elements, HTML, JS, DOM, Web APIs, Gecko-specific APIs, and more.
  • DXR is a source code search engine - search for symbols you want to learn about, eg. nsIDocument. Searchfox is an alternative.

It is a good idea to add smart keyword searches for DXR and MDN, so you can search faster.