To help differentiate between installer types, we've updated Firefox's title to clearly indicate whether it's an ESR or non-ESR version

To switch your installations, use the Software Deployment feature to create a combined job that removes the non-ESR version and installs the ESR version simultaneously:

You can use the same steps to switch from ESR to non-ESR, with swapping the uninstall/install options.

Note that the ESR and non-ESR installations conflict. Thus, Uninstall will happen first, and Install will happen after the next inspection.