Extension has been working great until today. I found myself unable to close a new tab from the Panorama view and then I realized that the Panorama view didn't include two tabs I'd opened this morning. I restarted FF to see if that fixed the problem, but after restart nothing happens when I click the Panorama icon. I also tried the shortcut keys and neither Ctrl+Shift+F or Alt+W is working. I assume the extension is loaded as I'm only seeing a fraction of the 70 tabs (according to the Panorama addon page) I currently have open. I upgraded to FF 60.0.1 last week and I didn't have any issues at the time of upgrade. The browser has probably been restarted a couple times since, not counting this morning.

Despite the hiccup today I really, really love this addon.

Edit: I disabled and re-enabled the addon and that fixed the problem.