Hmm, okay, interesting. Doesn't seem to be working, or at least it appears that way. We're making progress though so that's appreciated.
The 'Watched' tab acts more like a link to 'Posts', just with the addition of /1/ at the url's end, and the subscribe buttons don't appear to do anything visible.
javascript:void(0) appears in the lower left so I'd assume it has something to do with my javascript settings but those are already set to allow.
Cookies - Allowed
JS - Allowed
Autoplay - Blocked
Flash - Blocked
Popups/Redirects - Blocked
Going back into the extensions section, it seems like an error of some sort was thrown.
Line 36 is highlighted: var sender = event.detail.sender;
https://pastebin.com/T2UM88Fj
Updated by anonymous