A lightweight approach to removing Google web service dependency
Help is welcome! See the docs/contributing.md document for more information.
In descending order of significance (i.e. most important objective first):
- ungoogled-chromium is Google Chromium, sans dependency on Google web services.
- ungoogled-chromium retains the default Chromium experience as closely as possible. Unlike other Chromium forks that have their own visions of a web browser, ungoogled-chromium is essentially a drop-in replacement for Chromium.
- ungoogled-chromium features tweaks to enhance privacy, control, and transparency. However, almost all of these features must be manually activated or enabled. For more details, see Feature Overview.
In scenarios where the objectives conflict, the objective of higher significance should take precedence.
- Motivation and Philosophy
- Feature Overview
- Source Code
- Building Instructions
- Design Documentation
- Contributing, Reporting, Contacting
- Related Projects
Motivation and Philosophy
Without signing in to a Google Account, Chromium does pretty well in terms of security and privacy. However, Chromium still has some dependency on Google web services and binaries. In addition, Google designed Chromium to be easy and intuitive for users, which means they compromise on transparency and control of internal operations.
ungoogled-chromium addresses these issues in the following ways:
- Remove all remaining background requests to any web services while building and running the browser
- Remove all code specific to Google web services
- Remove all uses of pre-made binaries from the source code, and replace them with user-provided alternatives when possible.
- Disable features that inhibit control and transparency, and add or modify features that promote them (these changes will almost always require manual activation or enabling).
These features are implemented as configuration flags, patches, and custom scripts. For more details, consult the Design Documentation.
This section overviews the features of ungoogled-chromium. For more detailed information, it is best to consult the source code.
Contents of this section:
These are the core features introduced by ungoogled-chromium.
- Disable functionality specific to Google domains (e.g. Google Host Detector, Google URL Tracker, Google Cloud Messaging, Google Hotwording, etc.)
- Block internal requests to Google at runtime. This feature is a fail-safe measure for the above, in case Google changes or introduces new components that our patches do not disable. This feature is implemented by replacing many Google web domains in the source code with non-existent alternatives ending in
qjz9zk(known as domain substitution; see docs/design.md for details), then modifying Chromium to block its own requests with such domains. In other words, no connections are attempted to the
- Strip binaries from the source code (known as binary pruning; see docs/design.md for details)
These are the non-essential features introduced by ungoogled-chromium.
- Add many new command-line switches and
chrome://flagsentries to configure new features (which are disabled by default). See docs/flags.md for the exhaustive list.
- Add Suggestions URL text field in the search engine editor (
chrome://settings/searchEngines) for customizing search engine suggestions.
- Add more URL schemes allowed to save page schemes.
- Add Omnibox search provider "No Search" to allow disabling of searching
- Add a custom cross-platform build configuration and packaging wrapper for Chromium. It currently supports many Linux distributions, macOS, and Windows. (See docs/design.md for details on the system.)
- Force all pop-ups into tabs
- Disable automatic formatting of URLs in Omnibox (e.g. stripping
http://, hiding certain parameters)
- Disable intranet redirect detector (extraneous DNS requests)
- This breaks captive portal detection, but captive portals still work.
- (Iridium Browser feature change) Prevent URLs with the
trk:scheme from connecting to the Internet
- Also prevents any URLs with the top-level domain
qjz9zk(as used in domain substitution) from attempting a connection.
- Also prevents any URLs with the top-level domain
- (Windows-specific) Do not set the Zone Identifier on downloaded files
In addition to the features introduced by ungoogled-chromium, ungoogled-chromium selectively borrows many features from the following projects (in approximate order of significance):
Supported Platforms and Distributions
Other platforms are discussed and tracked in this repository's Issue Tracker. Learn more about using the Issue Tracker under the section Contributing, Reporting, Contacting.
NOTE: These binaries are provided by anyone who are willing to build and submit them. Because these binaries are not necessarily reproducible, authenticity cannot be guaranteed; In other words, there is always a non-zero probability that these binaries may have been tampered with. In the unlikely event that this has happened to you, please report it in a new issue.
These binaries are known as contributor binaries.
Also, ungoogled-chromium is available in several software repositories:
- Android: Available via a custom F-Droid repo. See instructions in ungoogled-chromium-android
- Arch: Available in AUR as
- Debian & Ubuntu: Available in OBS, find your distribution specific instructions in the Installing section
- Fedora & CentOS: Available in OBS, by following instructions in the downloads section. For Fedora also available in RPM Fusion as
- Gentoo: Available in
- macOS: Available in Homebrew as
eloston-chromium. Just run
brew fetch --cask eloston-chromiumand
brew install --cask eloston-chromium. Chromium will appear in your
If your GNU/Linux distribution is not listed, there are distro-independent builds available via the following package managers:
- Flatpak: Available in the Flathub repo as
- GNU Guix: Available as
- NixOS/nixpkgs: Available as
This repository only contains the common code for all platforms; it does not contain all the configuration and scripts necessary to build ungoogled-chromium. Most users will want to use platform-specific repos, where all the remaining configuration and scripts are provided for specific platforms:
If you wish to include ungoogled-chromium code in your own build process, consider using the tags in this repo. These tags follow the format
chromium_versionis the version of Chromium used in
revisionis a number indicating the version of ungoogled-chromium for the corresponding Chromium version.
Additionally, most platform-specific repos extend their tag scheme upon this one.
Building the source code: See docs/building.md
List of mirrors:
Contributing, Reporting, Contacting
- For reporting and contacting, see SUPPORT.md
- For contributing (e.g. how to help, submitting changes, criteria for new features), see docs/contributing.md
- If you have some small contributions that don't fit our criteria, consider adding them to ungoogled-software/contrib or our Wiki instead.
- The Chromium Project
- Inox patchset
- Iridium Browser
- The users for testing and debugging, contributing code, providing feedback, or simply using ungoogled-chromium in some capacity.
List of known projects that fork or use changes from ungoogled-chromium:
- Bromite (Borrows some patches. Features builds for Android)
- ppc64le fork (Fork with changes to build for ppc64le CPUs)
BSD-3-clause. See LICENSE