
I've been having this problem for about a week now and after a bit of testing I'm quite sure that it's something related to NoScript. I've tested it with NoScript disabled, as well as with NoScript enabled and all my other add-ons disabled to make sure it wasn't some weird interaction. I have allowed all scripts on The Guardian, so it doesn't have anything to do with anything obvious. Maybe a setting or something, though all I really changed in the settings was hiding that bar at the bottom of the screen, and that was way back when I first installed it. It doesn't occur for all Guardian pages, just most of them, and the length of the article doesn't seem to be a factor. After the issue occurs all I can do is to force-close Firefox.
I'm running NoScript 5.0.5 on Firefox 53.0.3 (64-bit). My other active add-ons are AdBlock, HTTPS Everywhere, Download Status Bar and DownThemAll!, but as I said, they don't seem to be the problem. I'm using Windows 7 Ultimate on an Intel Core 2 Quad CPU at 2.40 GHz.
Any ideas on why this is happening and what I can do other than completely disabling NoScript? Any other information that I could provide that could be of use in tracking it down?