The Servo Browser Engine
HTML Rust Python WebIDL C++ CSS Other
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The Servo Parallel Browser Project

Servo is a prototype web browser engine written in the Rust language. It is currently developed on 64bit OS X, 64bit Linux, and Android.

Servo welcomes contribution from everyone. See for help getting started.


On OS X (homebrew):

brew install automake pkg-config python cmake
pip install virtualenv

On OS X (MacPorts):

sudo port install python27 py27-virtualenv cmake

On Debian-based Linuxes:

sudo apt-get install curl freeglut3-dev \
    libfreetype6-dev libgl1-mesa-dri libglib2.0-dev xorg-dev \
    msttcorefonts gperf g++ cmake python-virtualenv \
    libssl-dev libbz2-dev libosmesa6-dev

On Fedora:

sudo yum install curl freeglut-devel libtool gcc-c++ libXi-devel \
    freetype-devel mesa-libGL-devel glib2-devel libX11-devel libXrandr-devel gperf \
    fontconfig-devel cabextract ttmkfdir python python-virtualenv expat-devel \
    rpm-build openssl-devel cmake bzip2-devel libXcursor-devel
pushd /tmp
rpmbuild -bb msttcorefonts-2.5-1.spec
sudo yum install $HOME/rpmbuild/RPMS/noarch/msttcorefonts-2.5-1.noarch.rpm

On Arch Linux:

sudo pacman -S --needed base-devel git python2 python2-virtualenv mesa ttf-font cmake bzip2

Cross-compilation for Android:

Pre-installed Android tools are needed. See wiki for details

The Rust compiler

Servo uses a snapshot Rust compiler to build itself. This is normally a specific revision of Rust upstream, but sometimes has a backported patch or two. If you'd like to know the snapshot revision of Rust which we use, see ./rust-snapshot-hash.


Servo is built with Cargo, the Rust package manager. We also use Mozilla's Mach tools to orchestrate the build and other tasks.

Normal build

git clone
cd servo
./mach build
./mach run tests/html/about-mozilla.html

Building for Android target

git clone
cd servo
ANDROID_TOOLCHAIN=/path/to/toolchain ANDROID_NDK=/path/to/ndk PATH=$PATH:/path/to/toolchain/bin ./mach build --android
cd ports/android
ANDROID_SDK=/path/to/sdk make install

Rather than setting the ANDROID_* environment variables every time, you can also create a .servobuild file and then edit it to contain the correct paths to the Android SDK/NDK tools:

cp servobuild.example .servobuild
# edit .servobuild


Commandline Arguments

  • -p INTERVAL turns on the profiler and dumps info to the console every INTERVAL seconds
  • -s SIZE sets the tile size for painting; defaults to 512
  • -z disables all graphical output; useful for running JS / layout tests

Keyboard Shortcuts

  • Ctrl-L opens a dialog to browse to a new URL (Mac only currently)
  • Ctrl-- zooms out
  • Ctrl-= zooms in
  • Backspace goes backwards in the history
  • Shift-Backspace goes forwards in the history
  • Esc exits servo


There are lots of mach commands you can use. You can list them with ./mach --help.