Both Chrome and Firefox limit you to 6 simultaneous http connections to the same host. Try opening this app in 7 separate tabs, and you'll see the 7th one just

Both Chrome and Firefox limit you to 6 simultaneous http connections to the same host. Try opening this app in 7 separate tabs, and you'll see the 7th one just spin and not even load the page's HTML. At least in Firefox, the limit for websockets is much more generous (200, but shared across the whole browser, IIRC). Both the Chrome and Firefox dev teams WONTFIXed my suggestion to increase the limit for Server Sent Event connections. https://code.google.com/p/chromium/issues/detail?id=275955 https://code.google.com/p/chromium/issues/detail?id=275955 https://bugzilla.mozilla.org/show_bug.cgi?id=906896 https://bugzilla.mozilla.org/show_bug.cgi?id=906896