I am having trouble with Sync not syncing my firefox preferences (as i have stated in the other thread dedicated to that), but i need some clarification on a line in about:config: "services.sync.engine.prefs.modified" Can anyone tell me exactly what this line does, and what happens when i change it? I tried setting it to "true" but it always resets itself to false, and just by the name it looks like it might be the cause of my sync issue. There is no mention of it in any about:config database/website, so i have to ask the firefox community. Does anyone knows what "services.sync.engine.prefs.modified" does?