STR: 1. open Firefox with profile manager (-P) 2. create a profile 3. start with that profile 4. open about:support 5. click 'refresh firefox', and click through the dialogs that follow, restore your tabs when asked. 6. exit Firefox ER: the newly-created default-yada-yada profile is selected if you now start the profile manager (it's the default) and has the Default=1 annotation in profiles.ini AR: neither of the above is actually the case Panos, it seems that this got broken with the split between selectedprofile and defaultprofile when implementing a separate profile for devedition. It also seems like Fx reset/refresh code is currently the only consumer of the setselectedprofile method on the profile manager ( https://dxr.mozilla.org/mozilla-central/search?q=setselectedprofile&=mozilla-central&redirect=true ) though I guess there's some stuff in the profile manager itself as well ( https://dxr.mozilla.org/mozilla-central/search?q=%22selectedProfile%20%3D&=mozilla-central&redirect=true ). Can you clarify how this is supposed to work?