] Add-ons are installable enhancements to the Mozilla Foundation’s projects, and projects based on them. Add-ons allow the user to add or augment application features, use themes to their liking, and handle new types of content.
] Add-ons are installable enhancements to the Mozilla Foundation’s projects, and projects based on them. Add-ons allow the user to add or augment application features, use themes to their liking, and handle new types of content.