The details of the first screenshot show of the perfection of this knife , really enjoy that ! <| sep |> It could be a number of things if it doesn ' t happen every time . Do you have a common wire installed ? It could be the battery losing charge from the fan being on constantly , the power stealing works when the unit is off . Maybe the furnace flame is dropping out rarely and it ' s recycling , maybe it ' s just not sensing the flame every few cycles . <| sep |> What about Thunderbird ? Will it switch as well ? If it does , will Enigmail be able to continue to function ? Will WebExtensions implement everything necessary for Enigmail ? As for Firefox , will GNotifier and Tab Groups still work ? Even if they have to be updated , will the Web Extensions API allow them to function ?