Code quality

Because Firefox is a complex piece of software, a lot of tools are executed to identify issues at development phase. In this document, we try to list these all tools.

• Static Analysis
• Linting
• Coding style

C/C++

Tools	Has autofixes	Meta bug	More info	Upstream
Custom clang checker			Source
Clang-Tidy	Yes	bug 712350	Static analysis	https://clang.llvm.org/extra/clang-tidy/checks/list.html
Clang analyzer		bug 712350		https://clang-analyzer.llvm.org/
cpp virtual final			cpp virtual final
clang-format	Yes	bug 1188202	Formatting C++ Code With clang-format	https://clang.llvm.org/docs/ClangFormat.html

CSS

Tools	Has autofixes	Meta bug	More info	Upstream
Stylelint	Yes	bug 1762027	Stylelint	https://stylelint.io/
Mozilla Stylelint			Mozilla Stylelint Plugin

JavaScript

Tools	Has autofixes	Meta bug	More info	Upstream
Eslint	Yes	bug 1229856	ESLint	https://eslint.org/
Mozilla ESLint		bug 1229856	Mozilla ESLint Plugin
Prettier	Yes	bug 1558517	JavaScript Coding style	https://prettier.io/

Python

Tools	Has autofixes	Meta bug	More info	Upstream
ruff	Yes	bug 1811850	Ruff	https://github.com/charliermarsh/ruff
black	Yes	bug 1555560	Black	https://black.readthedocs.io/en/stable

Rust

Tools	Has autofixes	Meta bug	More info	Upstream
Rustfmt	Yes	bug 1454764	Rustfmt	https://github.com/rust-lang/rustfmt
Clippy	Yes	bug 1361342	clippy	https://github.com/rust-lang/rust-clippy
cargo-audit		bug 1747536	cargo-audit	https://rustsec.org/

Java/Kotlin

Tools	Has autofixes	Meta bug	More info	Upstream
Spotless	Yes	bug 1571899	Spotless	https://github.com/diffplug/spotless

Others

Tools	Has autofixes	Meta bug	More info	Upstream
shellcheck				https://www.shellcheck.net/
rstchecker			RST Linter	https://github.com/myint/rstcheck
Typo detection	Yes		Codespell	https://github.com/codespell-project/codespell
Fluent Lint	No		Fluent Lint
YAML linter	No		yamllint	https://github.com/adrienverge/yamllint