Open Source Firefox Add-ons

Firefox add-ons are browser extensions that change or extend how Firefox works. They can add features to websites, customize the browser interface, automate repetitive tasks, and support needs such as privacy, accessibility, or focused browsing. Open source add-ons make their source code available for inspection and reuse, offering users and developers more visibility into how browser features are implemented and what data they access.

The category includes tools for productivity, website improvements, privacy controls, customization, and developer workflows. When choosing an add-on, check its maintenance activity, license, Firefox compatibility, required permissions, and any external services or account requirements. Consider how it integrates with your existing browser habits and whether its capabilities match your needs. These tools are useful to everyday users seeking a more tailored browsing experience, as well as developers who want to build, adapt, or examine browser functionality.