This system add-on replaces the new tab page in Firefox with a new design and functionality as part of the Activity Stream project.
The files in this directory, including vendor dependencies, are imported from the system-addon directory in https://github.com/mozilla/activity-stream.
Read docs/v2-system-addon for more detail.
We regularly check the ActivityStream:NewTab component on Bugzilla.
If you are interested in contributing, take a look at this guide on where to find us and how to contribute, and this guide for getting your development environment set up.
Activity Stream localization is managed via Pontoon, not direct pull requests to the repository. If you want to fix a typo, add a new language, or simply know more about localization, please get in touch with the existing localization team for your language, or Mozilla’s l10n-drivers for guidance.