Chrome regularly runs out of memory
JaSMIn crashes pretty frequently for me with an out of memory error. Have you ever seen that?
I took a heap snapshot in the Chrome dev tools (not in the case of the crash, the dev tools aren't accessible anymore after that). The Heap had 410 MB in this example, which seems a bit much? On YouTube, it's around 50 while viewing a video on 720p.
I would have attached the heap snapshot, but it has 146 MB itself.