Mozilla Add-ons facts for kids

Kids Encyclopedia Facts

Mozilla Add-ons is the official Mozilla website to store add-ons for Mozilla software. This software includes Mozilla Firefox, Mozilla Thunderbird, SeaMonkey, and Mozilla Sunbird.

These add-ons include extensions, themes, dictionaries, search bar "search engines", and plugins.


Mozilla Update (UMO, is the oldest name of Mozilla Add-ons. AMO is a non-official name for Mozilla Add-ons today.


Add-on developers are thousands of volunteers. Not Mozilla employees. After an upload, add-ons are reviewed. If accurate, they're published.

Mozilla Add-ons Facts for Kids. Kiddle Encyclopedia.