I have the same problem as [[https://support.mozilla.org/en-US/user/own404410|@Sky]] at "[[https://support.mozilla.org/en-US/questions/1282075|Synced Addons for Normal and Developer Edition separately]]". I would like to present the problem from my side and propose a not difficult but useful solution. "Synced Addons *and settings* for Normal and Developer Edition separately" is a feature I need and require from Mozilla. I don't want to have developer-only extensions and settings from Developer Edition in the normal browser. I also don't want to create a separate account because I won't be able to view Developer Edition browser content on my phone. The best would still be share search history and bookmarks with both browsers and the phone. "Synchronization channel selection function and synchronization content" could be a solution. On a normal browser I create a "normal" synchronization channel and there I choose all the elements to be synchronized. On Developer Edition I create a new "developer" channel and choose sync: history, tabs, bookmarks, addons and settings. Additionally, I choose the existing "normal" channel for synchronization of history and bookmarks. And I sync my phone with the normal channel. Please consider such a feature in Firefox browsers ;)))