The page renders, but the spinning "busy" cursor is displayed permanently over the page and it is unresponsive to mouse clicks. It doesn't look like a classic case of runaway JavaScript, because the CPU usage is low.
It would be helpful to know if this is Ubuntu-specifc, Linux-specific or just Firefox-specific - if anyone can test using Firefox on another OS that would be helpful.
I can reproduce this.
The page renders, but the spinning "busy" cursor is displayed permanently over the page and it is unresponsive to mouse clicks. It doesn't look like a classic case of runaway JavaScript, because the CPU usage is low.
It would be helpful to know if this is Ubuntu-specifc, Linux-specific or just Firefox-specific - if anyone can test using Firefox on another OS that would be helpful.