Truly independent web browser
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Aliaksandr Kalenik d1fbb7b51e LibWeb: Invalidate less elements affected by CSS custom properties
Before this change, whenever element's attributes changed, we would add
a flag to "pending invalidation", indicating that all descendants whose
style uses CSS custom properties needed to be recomputed. This resulted
in severe overinvalidation, because we would run invalidation regardless
of whether any custom property on affected element actually changed.

This change takes another approach, and now we decide whether
descendant's style needs to be recomputed based on whether ancestor's
style recomputation results in a change of custom properties, though
this approach adds a little overhead to style computation as now we have
to compare old vs new hashmap of custom properties.

This brings substantial improvement on discord and x.com where, before
this change, advantage of using invalidation sets was lost and we had
to recompute all descendants, because almost all of them use custom
properties.
2025-07-30 11:06:05 +02:00
.devcontainer Devcontainer: Set dynamic triplets for vcpkg cache feature 2025-07-16 08:36:50 +02:00
.github CI: Add nightly flatpak workflow 2025-07-23 16:27:49 -06:00
AK AK: Define operator== for HashMap 2025-07-30 11:06:05 +02:00
Base/res Meta: Remove bookmarks.json 2025-07-11 14:04:23 +02:00
Documentation Documentation: Add instructions on how to build the Flatpak 2025-07-24 14:25:03 -06:00
Libraries LibWeb: Invalidate less elements affected by CSS custom properties 2025-07-30 11:06:05 +02:00
Meta Meta: Add a freedesktop appstream/metainfo manifest 2025-07-28 19:37:48 -06:00
Services LibWeb: Port the FormAssociatedElement value to UTF-16 2025-07-28 12:25:11 +02:00
Tests AK: Define operator== for HashMap 2025-07-30 11:06:05 +02:00
Toolchain Meta: Add SPDX license identifier to ladybird.py and BuildVcpkg.py 2025-05-29 16:24:17 -04:00
UI CMake: Install AppStream metainfo file with absolute path 2025-07-29 11:31:12 +02:00
Utilities Utilites: Remove extra dashes from raw strings argument to js 2025-07-10 16:28:40 -06:00
.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 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 CMake: Add a flatpak build for org.ladybird.Ladybird 2025-07-08 11:45:32 -06:00
.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 Meta: Don't lint imported WPT crash tests with prettier 2025-06-22 23:51:34 +02:00
.prettierrc Meta: Move prettier config files to the root of the repository 2020-08-24 18:21:33 +02:00
.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.