Clean up errors in our error console
It seems like we are accumulating some more errors in our error console, and legacy/trac#16427 (moved) and legacy/trac#16428 (moved) added a couple more (see https://trac.torproject.org/projects/tor/ticket/16427#comment:8 for a potential patch plan for that).
I think this might be worth patching at some point during the FF38 transition. We can create subtickets as needed.