Mac 10.8.6 and Windows 7
Firefox (only) 38.0.5
Starting last night, the spinning blue disc that indicates a loading page in Facebook appears and won't stop when I click on (and thus open) a notification. The disc isn't visible when I mouse over a link, image or other graphic, but appears everywhere else.
If I refresh the page, the spinning disc goes away--until I click on a notification,
This problem doesn't occur in my other browsers, Chrome and Safari, just in Firefox. And it occurs whether I'm using OSX or Windows 7. This would seem to indicate that something is suddenly going on between Firefox and Facebook.
Any help would be appreciated.