[edraferi]

Oh that’s pretty cool. I’ll try that.

I just assumed that this behavior would apply to everything once I turned sync on, and then was disappointed when it didn’t work. I had no idea it was an optional feature.

I guess it doesn’t fit the key-value paradigm, but this feature would be a lot more discoverable if there was a “sync?” Attribute next to each about:config item.

[yoklov]

Being a global persisted key value store, about:config has a lot of things stored in it that.... do not necessarily make sense syncing, hence it being opt-in. Sync is guilty of this too, and will store things like your last sync time in about config, for example. Clearly not meaningful to sync directly.

A checkbox like you describe was actually discussed in the past, but at this point it’s unlikely. The current design of letting any synced machine change any pref on any remote machine (effectively) has dubious security implications, and has gained an additional hoop you must jump through in nightly.