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This catalog contains75,687 versions of16,706 Firefox add-ons created by12,538 developers over the past14 years using XUL/XPCOM technology before Mozilla decided to ruin the classic extensions ecosystem and go exclusively to WebExtensions.

The add-ons listed here have been created by a wide range of developers from individual hobbyists to large corporations and were reviewed by a team of AMO editors before being released. Add-ons marked as Experimental have not been reviewed and should be installed with caution.

All the data contained in this catalog was obtained from publicly available sources such asAMO,Wayback Machine and other open Internet directories and collections. All download links currently also point to AMO, an independent repository is under way. Any help with hosting the main data storage or mirror is highly welcomed.

Except as noted below, this catalog is released underMozilla Public License, version 2.0. The design is based on AMO website byMozilla and adapted by JustOff underCC-BY-SA-3.0. All product names, logos and brands are property of their respective owners, specific licenses are indicated in the description of each add-on. All company, product and service names used in this catalog are for identification purposes only.

This add-on has been tested with the following browsers (in alphabetical order): Basilisk RC1, Firefox ESR 45-52, Firefox 45-58b, Pale Moon 27 and Waterfox 55. In order to install it into Firefox release or beta, you need to disable the extensions signing requirement. Multi-process mode (e10s) is not supported. The installation package is located in thereleases section.