I am not sure if we have enough data for a bug request right now.Wouldn't it be easier to involve the Newsblur dev. directly?
First of all, we have not yet narrowed it down to newsblur.com
Second, we don't have enough data for a bug report.
What could be useful to him (if the cause is newsblur):
1. WS connection data
2. What's done in the browser console
3. Something else? Do you have any idea?
The problem with WS connection is that FF does not allow us to see what's going on inside (unlike Chrome).
There is a bug still in Status=NEW for 2.5 years:
Yeah, right, they'd better spend some time on forcing and then partially rolling back extension signing.