Firefox Gecko to OpenHarmony ArkUI XComponent Porting Guide Overview This guide provides step-by-step instructions for porting Mozilla Firefox's Gecko engine to OpenHarmony's ArkUI XComponent, bypassing the default web view implementation. OpenHarmony is the open-source foundation that differs from commercial HarmonyOS in APIs, build tools, and licensing. Key Differences: OpenHarmony vs HarmonyOS OpenHarmony Characteristics
Open Source: Full source code available at https://gitee.com/openharmony OHOS APIs: Uses OH_ prefixed APIs instead of Huawei-specific ones Build System: Uses OpenHarmony SDK and toolchain (not DevEco Studio) Target Platforms: ARM64, RISC-V, x86_64 support Licensing: Apache 2.0 license
Prerequisites OpenHarmony Development Environment bash Download OpenHarmony SDK
git clone https://gitee.com/openharmony/build.git
git clone https://gitee.com/openharmony/developtools_hdc.git
export OHOS_SDK_HOME=/path/to/ohos-sdk
export OHOS_NDK_HOME=$OHOS_SDK_HOME/native
export PATH=$PATH:$OHOS_NDK_HOME/llvm/bin
./prebuilts/clang/ohos/linux-x86_64/clang-480513/bin/clang --version Required Components
OpenHarmony 4.0+ SDK LLVM/Clang for OpenHarmony Rust toolchain with OpenHarmony targets Python 3.8+ Node.js 16+ (for ArkTS compilation)
Target Setup bash# Add OpenHarmony Rust targets rustup target add aarch64-unknown-linux-ohos rustup target add armv7-unknown-linux-ohos rustup target add x86_64-unknown-linux-ohos
┌─────────────────────────────────────────────┐
│ OpenHarmony Application │
├─────────────────────────────────────────────┤
│ ArkUI Framework (eTS/ArkTS) │
│ ┌─────────────────────────────────────────┐ │
│ │ XComponent (Native Surface) │ │
│ │ ┌─────────────────────────────────┐ │ │
│ │ │ OH_NativeXComponent │ │ │
│ │ │ EGL/OpenGL ES Context │ │ │
│ │ │ Event Handling Bridge │ │ │
│ │ └─────────────────────────────────┘ │ │
│ └─────────────────────────────────────────┘ │
├─────────────────────────────────────────────┤
│ Modified Gecko Engine for OHOS │
│ ┌─────────────────────────────────────────┐ │
│ │ SpiderMonkey JS Engine │ │
│ │ Servo Layout Engine │ │
│ │ WebRender (OpenGL ES Backend) │ │
│ │ OHOS Platform Abstraction Layer │ │
│ │ ├─ OHOS File System APIs │ │
│ │ ├─ OHOS Network APIs │ │
│ │ ├─ OHOS Graphics APIs │ │
│ │ └─ OHOS Memory Management │ │
│ └─────────────────────────────────────────┘ │
└─────────────────────────────────────────────┘
FirefoxOHOS/
├── entry/ # Main application module
│ ├── src/
│ │ ├── main/
│ │ │ ├── ets/ # ArkTS source code
│ │ │ │ ├── Application/
│ │ │ │ ├── MainAbility/
│ │ │ │ ├── pages/
│ │ │ │ │ └── Index.ets # Main page with XComponent
│ │ │ │ └── components/ # Custom components
│ │ │ ├── resources/ # Resource files
│ │ │ ├── cpp/ # Native C++ code
│ │ │ │ ├── gecko_bridge/ # Gecko-OpenHarmony bridge
│ │ │ │ ├── xcomponent_adapter/
│ │ │ │ └── CMakeLists.txt
│ │ │ └── libs/ # Prebuilt libraries
│ │ │ └── gecko/ # Compiled Gecko libraries
│ │ └── ohosTest/ # Test code
│ └── build-profile.json # Build configuration
├── gecko_port/ # Gecko porting layer module
│ ├── src/
│ │ └── main/
│ │ ├── cpp/
│ │ │ ├── widget/ # OpenHarmony widget implementation
│ │ │ ├── gfx/ # Graphics integration
│ │ │ ├── netwerk/ # Network stack
│ │ │ └── xpcom/ # XPCOM components
│ │ └── CMakeLists.txt
│ └── build-profile.json
├── webrender_ohos/ # WebRender adaptation module
│ ├── src/
│ │ └── main/
│ │ ├── rust/ # Rust WebRender bindings
│ │ ├── cpp/ # C++ integration layer
│ │ └── CMakeLists.txt
│ └── build-profile.json
├── build/
├── gradle/
├── local.properties
└── settings.gradle # Module inclusion