This is version 1.0 of Legacy Browser Support for Firefox.

The corresponding extension is available here:

https://addons.mozilla.org/en-US/firefox/addon/legacy-browser-support/

This release is only intended for initial test. The Browser Helper Object is not included, so IE will not switch back to Firefox (yet). This means the following policies cannot be tested:

Firefox Arguments
Firefox Path
Hosts to Open in Either Browser (although you can verify these open in Firefox without invoke IE)

The Firefox extension is available here:

https://addons.mozilla.org/en-US/firefox/addon/legacy-browser-support/

Information about the IE Enterprise Mode Site list can be found here:

https://docs.microsoft.com/en-us/internet-explorer/ie11-deploy-guide/turn-on-enterprise-mode-and-use-a-site-list

To use, run the installer, install the extension, and install the templates.