Hey, I'm not sure if this should be considered a bug with cohost or not, but currently the Memex extension in Firefox causes the site to be replaced by a blank screen. Now that I look at it, it might be more of a Memex bug, but I supposed there might be other extensions that could cause a similar problem. I attached the error log if it helps at all.
We can't offer support for third-party extensions, especially ones we don't use. I would recommend reporting this issue to Memex.