This seems to have changed as there are reports that there is on warning on Facebook Home when it is installed on HTC One. It has also been reported by Android Central that users of Galaxy S4 can use the app after bypassing the “Use Home Anyway” warning. Official support for HTC One comes without change in the version of the app and nothing has been mentioned in the change log either. To run the app on S4, users would need an up-to-date Facebook app.
The support for HTC One and S4 comes alongside a small press conference held by Facebook yesterday where it announced that Facebook Home had hit 1 million downloads but, it failed to reveal home many users were actively using the app.