UltraBlock Pro is proudly open source under the MIT License
Inspect, audit, and verify everything UltraBlock Pro does
Use UltraBlock Pro for personal or commercial purposes
Customize the code to fit your specific needs
Share the original or modified versions with others
Copyright (c) 2024 UltraBlock Pro Team
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
The complete source code for UltraBlock Pro is available on GitHub:
We welcome contributions from the community! Here's how you can help:
Submit bug fixes, new features, or improvements via pull requests
Report issues and help us identify problems to fix
Help make UltraBlock Pro available in more languages
Improve our documentation, tutorials, and guides
UltraBlock Pro uses the following open source libraries and components:
License: Font Awesome Free License
Use: Icons throughout the user interface
Website: fontawesome.com
License: SIL Open Font License 1.1
Use: Primary typography
Website: rsms.me/inter
License: SIL Open Font License 1.1
Use: Monospace font for code and statistics
Website: jetbrains.com/mono
The MIT License is compatible with most other open source licenses, making it easy to integrate UltraBlock Pro with other projects:
Can be included in GPL-licensed projects
Allowed in commercial and proprietary software
Can be redistributed in original or modified form
Can be relicensed under different terms
Being open source means our code is transparent and auditable:
Security researchers can review our code for vulnerabilities
Thousands of eyes reviewing the code for quality and security
You can compile from source to verify the extension's integrity
Complete git history shows every change made to the code
You can build UltraBlock Pro from source code to ensure you're running exactly what you expect:
git clone https://github.com/ultrablockpro/extension.git
npm install
npm run build
Load the built extension in Firefox's temporary add-on feature
If you have questions about the license or want to use UltraBlock Pro in a way not covered by the MIT License, please contact us: