site constantly loading

[AstroBee]

I've just noticed that every page I visit on beesource seems to be constantly loading. The content is fully loaded, but it seems to still spool away. I can stop it from loading and the page is fully functional. I don't see this problem on other sites. I'm using Firefox

[snl]

I see that often also and I use Google Chrome........

[Barry]

What indicator shows that it's still loading?