[cptskippy]

Am I missing something? I don't see how that ties into Firefox Sync to propagate changes to all instances.

* Also, that's very cool regardless.

[helenius]

Not really, just that you need to be crazy enough to write and sync a file instead with e.g. Resilio or Dropbox.

[cptskippy]

Well I appreciate the link. That's certainly easier than editing properties in about:config.