What's Changed
Good news! You no longer need a special UnifiedPush flavor of Molly. You can now install the normal Molly-FOSS app and get all that UnifiedPush goodness. This also means UnifiedPush is now a first-class citizen in the Molly project and we can look forward to stable ongoing support for this feature.
One slight wrinkle though: You need to take some manual steps. See the migration guide.
Please do create issues if you, uh... have any issues.
Special thanks to @p1gp1g not only for maintaining MollySocket, but also for helping get the new version up and running with VAPID support.