I have weird problem:
Often, when I go to joindiaspora.com, Firefox turns on blocking of cookies for that domain. It's only when I go to the front page.
I've created a video of what happens: https://blackfin.cannedtuna.org/firefox-joindiaspora-block-cookies.mp4 (4,5MB) (and uploaded to Vimeo if your don't trust the first link: https://vimeo.com/75958833)
Recently, I also experienced this on a particular subpage of flattr.com
Does anyone know what's going on?