I'm using a completely clean (reinstalled) version of firefox. I'm not logged into a profile. I'm still having the same problem. If I go onto twitter for the first time, it loads fine and I can move around pages. As soon as I leave the site, then return, none of the internal twitter timelines load - I get the twitter message 'something has gone wrong'. If I delete all my cookies and revisit twitter, it works. But again, if I leave the site and come back immediately, the problem comes back and nothing loads. Anyone experienced this/know what I can do? Thanks ''duplicate. https://support.mozilla.org/en-US/questions/1286675''