Truly independent web browser
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Timothy Flynn eb74781a2d LibJS: Keep the lookahead lexer alive after parsing its next token
Currently, the lexer holds a ByteString, which is always heap-allocated.
When we create a copy of the lexer for the lookahead token, that token
will outlive the lexer copy. The token holds a couple of string views
into the lexer's source string. This is fine for now, because the source
string will be kept alive by the original lexer.

But if the lexer were to hold a String or Utf16String, short strings
will be stored on the stack due to SSO. Thus the token will hold views
into released stack data. We need to keep the lookahead lexer alive to
prevent UAF on views into its source string.
2025-08-13 09:56:13 -04:00
.devcontainer Devcontainer: Set dynamic triplets for vcpkg cache feature 2025-07-16 08:36:50 +02:00
.github CI: Remove Microphone access step for macOS 2025-08-12 14:31:41 +02:00
AK AK+LibJS+LibWeb: Recognize that our UTF-16 string is actually WTF-16 2025-08-13 09:56:13 -04:00
Base/res UI/Qt: Add "Dump CSS Errors" menu item 2025-08-04 10:50:09 +01:00
Documentation LibWeb/CSS: Rename CSSKeywordValue -> KeywordStyleValue 2025-08-08 15:19:03 +01:00
Libraries LibJS: Keep the lookahead lexer alive after parsing its next token 2025-08-13 09:56:13 -04:00
Meta LibWeb/CSS: Stub out CSSStyleValue 2025-08-13 09:47:50 +01:00
Services RequestServer: Clarify comment for removing Content-Type header 2025-08-13 06:30:56 -04:00
Tests AK+LibJS+LibWeb: Recognize that our UTF-16 string is actually WTF-16 2025-08-13 09:56:13 -04:00
Toolchain Meta: Add SPDX license identifier to ladybird.py and BuildVcpkg.py 2025-05-29 16:24:17 -04:00
UI LibCore: Remove unused "visible for timer purposes" concept 2025-08-11 16:55:25 +02:00
Utilities LibWasm: Try really hard to avoid touching the value stack 2025-08-08 12:54:06 +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: Change the default build directories to exclude "ladybird" prefix 2024-11-06 10:38:57 -07:00
.editorconfig
.gitattributes LibGfx: Remove support for the various "portable" image formats 2024-06-17 21:57:35 +02:00
.gitignore CMake: Add a flatpak build for org.ladybird.Ladybird 2025-07-08 11:45:32 -06:00
.gn
.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 Meta: Don't lint imported WPT crash tests with prettier 2025-06-22 23:51:34 +02:00
.prettierrc
.swift-format Meta: Add swift-format configuration 2024-07-30 18:38:02 -06:00
.swift-version Meta: Update swift version to 2025-06-22 2025-07-09 16:26:49 -06:00
.ycm_extra_conf.py Meta: Sort all python imports 2025-06-09 11:25:14 -04:00
CMakeLists.txt CMake: Allow Windows to build Lib/Test GUI targets 2025-06-26 19:35:14 -06:00
CMakePresets.json CMake: Improve preset display names and descriptions 2025-07-09 16:26:59 -06:00
CODE_OF_CONDUCT.md Meta: Add code of conduct (from the Ruby community) 2024-10-02 09:49:52 +02:00
CONTRIBUTING.md Documentation: Fix Ladybird's documentation url 2025-05-20 15:53:48 -04:00
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
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/curl: Update to 8.15.0 2025-07-21 15:09:35 +02:00

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.