Firefox Marketplace Apps Stop Working on Firefox 48+ for Windows, Mac, and Linux

The Firefox feature that enables you to run Firefox Marketplace apps will be removed from Firefox in version 48.

After you update to Firefox 48, or a newer version, apps that you've installed from the Firefox Marketplace will stop working. When you start an app, it won't run. And it may tell you, "This app requires that Firefox version 16 or above is installed. Firefox 16+ has not been detected."

There are a few ways to work around the change.

In most cases, Marketplace apps are also available on the Web and can be accessed from a tab in Firefox. Search for the app on the Web using your favorite search engine.

In a few cases, Marketplace apps aren't available elsewhere. For those apps, you'll need to switch to a different app that provides similar functionality. Search for web apps using your favorite search engine, or search for desktop apps using the app marketplace for your operating system.

The Firefox Extended Support Release is an edition of Firefox that updates less frequently. It is intended for groups who manage software on many desktops. Firefox ESR will support Marketplace apps until it updates to version 52 in 2017. If you manage many desktops for an organization that uses Marketplace apps, switch to ESR to gain extra time to switch to alternatives.

Note: In addition to this change in Firefox, Marketplace will stop distributing apps for Windows, Mac, and Linux on March 29, 2016. See the Future of Marketplace FAQ for more information about that change.