Classic Add-Ons Archive is described as 'Classic Add-ons Archive catalog contains 93,598 versions of 19,450 Firefox add-ons created by 14,274 developers over the past 15 years using XUL/XPCOM technology before Mozilla decided to ruin the classic extensions ecosystem and go exclusively to WebExtensions' and is an app in the web browsers category. There are four alternatives to Classic Add-Ons Archive for a variety of platforms, including Web-based, Chrome OS, Self-Hosted, Sunbird and Thunderbird apps. The best Classic Add-Ons Archive alternative is Mozilla Add-ons, which is both free and Open Source. Other great apps like Classic Add-Ons Archive are WebExtension.ORG, WebExtension.net and Plugins Addons Extensions.