What do I do to prevent my website freezing after some time

I've got a website (http://ift.tt/1SzzsAZ) which is quite JavaScript (jQuery) heavy. There are several scheduled background tasks (refresh of feeds) and animations. After an hour or so the browser tab freezes. Are there any obvious things to check to prevent this from happening (emptying animation queues or similar)? I was thinking of doing a complete website refresh after an hour or so, but that's not very user friendly. Any suggestions are welcome :)