Mozilla Firefox has recently updated and the latest version has disabled the Garmin Communicator Add-ons, apparently for added security all add-ons have to be "signed" whatever that is.
Because I am on Windows 10 I have Microsoft Edge rather than explore and Garmin Communicator is not compatible with that either.
Anyone else got this problem and know how to resolve it?

Because I am on Windows 10 I have Microsoft Edge rather than explore and Garmin Communicator is not compatible with that either.
Anyone else got this problem and know how to resolve it?