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Andreas Kling e2e3c7fcdf LibWeb: Rebuild counter style cache lazily
Stop rebuilding the counter style cache from every style update.
That made unrelated restyles pay the full counter-style cost even when
no relevant stylesheet state had changed.

Dirty the cache when stylesheet rule caches are invalidated and rebuild
it on the first counter-style lookup instead. Also make cold cache
rebuilds include user stylesheets.

Add regression tests covering insertRule() and replaceSync() updates
that should make newly defined counter styles take effect.
2026-04-05 12:34:28 +02:00
.devcontainer Meta: Add Rust toolchain as a build dependency 2026-02-24 09:39:42 +01:00
.github CI: Bump actions/upload-artifact from 6 to 7 2026-03-31 22:21:19 +02:00
AK AK: Don't convert encode_base64_impl() input to StringView 2026-03-31 18:14:28 +01:00
Base/res Base: Support opening a specific settings tab via anchors 2026-03-05 10:00:32 -05:00
Documentation LibWeb: Only allow ASFs in descriptor values if explicitly supported 2026-03-30 19:57:36 +01:00
Libraries LibWeb: Rebuild counter style cache lazily 2026-04-05 12:34:28 +02:00
Meta LibWeb: Factor newTarget prototype setup into WebIDL helper 2026-04-05 02:09:39 +02:00
Services LibWeb: Support CSS modules 2026-04-03 21:21:09 +02:00
Tests LibWeb: Rebuild counter style cache lazily 2026-04-05 12:34:28 +02:00
Toolchain Meta: Do not run platform.libc_ver() on Windows 2026-01-07 16:16:40 -05:00
UI UI/AppKit: Handle cmd+left mouse clicks on bookmarks 2026-04-04 10:23:06 -04:00
Utilities test262-runner: Support multi-line YAML flags 2026-03-29 13:21:17 +02:00
.clang-format Meta: Enforce newlines around namespaces 2025-05-14 02:01:59 -06:00
.clang-tidy Meta: Disable clang-tidy's const correctness checks 2025-07-08 11:04:15 -04:00
.clangd Meta: Enable angled brackets in clangd 2026-03-20 19:32:14 +01:00
.editorconfig Meta: Add .editorconfig 2022-09-10 17:32:55 +01:00
.gitattributes LibGfx: Remove support for the various "portable" image formats 2024-06-17 21:57:35 +02:00
.gitignore Meta: Add Rust toolchain as a build dependency 2026-02-24 09:39:42 +01:00
.gn Meta: Automatically generate a compilation database for clangd 2023-11-14 14:29:35 -05:00
.mailmap Meta: Update my e-mail address everywhere 2024-10-04 13:19:50 +02:00
.pre-commit-config.yaml Meta: Replace deprecated pre-commit stage name 2024-10-18 09:40:59 +02:00
.prettierignore Tests: Exclude JS AST and bytecode tests from prettier checks 2026-02-19 02:45:37 +01:00
.prettierrc Meta: Increase the line length enforced by prettier to 120 2025-10-31 19:55:50 -04:00
.ycm_extra_conf.py Meta: Sort all python imports 2025-06-09 11:25:14 -04:00
Cargo.lock LibRegex/Rust: Add the ECMA-262 regex engine 2026-03-27 17:32:19 +01:00
Cargo.toml LibRegex/Rust: Add the ECMA-262 regex engine 2026-03-27 17:32:19 +01:00
CMakeLists.txt AK: Move generating the Debug.h header to AK's CMakeLists 2026-03-29 13:59:11 -06:00
CMakePresets.json CMake+CI: Use the same preset names on every platform 2026-01-17 12:18:46 -07:00
CODE_OF_CONDUCT.md Meta: Add code of conduct (from the Ruby community) 2024-10-02 09:49:52 +02:00
CONTRIBUTING.md Meta: Add Gregory Bertilson to maintainer list :^) 2025-08-21 14:20:45 +02:00
ISSUES.md Everywhere: Document use of ladybird.py over ladybird.sh 2025-05-29 16:24:17 -04:00
LICENSE Meta: Update license year 2025-02-10 11:40:57 +00:00
pyproject.toml Meta: Use "extend-select" to enable non-default python linters 2025-06-09 17:49:35 -04:00
README.md Libraries: Remove LibArchive 2024-11-25 13:37:45 +01:00
rust-toolchain.toml Meta: Add a rust-toolchain toml file to pin required rust version 2026-03-02 10:10:04 +01:00
SECURITY.md Documentation: Make updates to align better with new issue template 2024-10-31 09:18:08 +01:00
vcpkg-configuration.json Meta: Add overlay port for vulkan-loader 2024-07-07 15:56:59 +02:00
vcpkg.json Meta: Update sqlite3 to version 3.52.0 2026-03-31 17:28:21 -04:00

Ladybird

Ladybird is a truly independent web browser, using a novel engine based on web standards.

Important

Ladybird is in a pre-alpha state, and only suitable for use by developers

Features

We aim to build a complete, usable browser for the modern web.

Ladybird uses a multi-process architecture with a main UI process, several WebContent renderer processes, an ImageDecoder process, and a RequestServer process.

Image decoding and network connections are done out of process to be more robust against malicious content. Each tab has its own renderer process, which is sandboxed from the rest of the system.

At the moment, many core library support components are inherited from SerenityOS:

  • LibWeb: Web rendering engine
  • LibJS: JavaScript engine
  • LibWasm: WebAssembly implementation
  • LibCrypto/LibTLS: Cryptography primitives and Transport Layer Security
  • LibHTTP: HTTP/1.1 client
  • LibGfx: 2D Graphics Library, Image Decoding and Rendering
  • LibUnicode: Unicode and locale support
  • LibMedia: Audio and video playback
  • LibCore: Event loop, OS abstraction layer
  • LibIPC: Inter-process communication

How do I build and run this?

See build instructions for information on how to build Ladybird.

Ladybird runs on Linux, macOS, Windows (with WSL2), and many other *Nixes.

How do I read the documentation?

Code-related documentation can be found in the documentation folder.

Get in touch and participate!

Join our Discord server to participate in development discussion.

Please read Getting started contributing if you plan to contribute to Ladybird for the first time.

Before opening an issue, please see the issue policy and the detailed issue-reporting guidelines.

The full contribution guidelines can be found in CONTRIBUTING.md.

License

Ladybird is licensed under a 2-clause BSD license.