David

Thanks for the suggestions. I've tried Tampermonkey 4.7.5788, Violentmonkey 2.9.5 and Greasemonkey 4.4 and they're failing as well. Here's the message from the console: userscript.html:356:17 Failed sending chat request message....

Tampermonkey in Chrome works, so I guess that makes it seem more like a Firefox issue. *edit: And I clicked the wrong button while posting this and closed the issue...

I tried a fresh Firefox profile and it worked, so the problem does appear to be with my Firefox configuration. I'll need to experiment a bit and see if I...