catch responseText ( ajax or other) via extentions (plugins)

target url https://mobile.28365-365.com/#type=InPlay; I was Add a content script and catch ajax response using ([login to view URL] and addEventListener load) This is working very well first 5 seconds and do not shows any response. Tried devtool' Event Listener Breakpoints for XHR and did not stopped. I can parsing web page but the page do not include instant bet code. It only delivery using ajax ( or something) on background. I think two ways possible 1. Hide ajax protocol by special jquery of main site. 2. Using different ways after 5 seconds. I need the instant code and moving odds. So need let me know how to get the response and successfully js code.