Just a heads-up: I’ve been unable to share anything ove the past week. Since nobody else seemed to have this problem I figured it must be something wrong with my setup.
Turns out it was the NoScript plugin for Firefox - it’s a very paranoid plugin, and generally speaking that’s a good thing! It’s a bit inconvenient when trying to convince it a site is “safe” though. Knowing neither regexp nor the inner workings of the bookmarklet, I’m not sure how to whitelist NewsBlur in the XSS filter, so if anyone could help?
Also, this applies to both the main site and the bookmarklet.