How to debug a script?

There website and there is a script on this site you want to debug, it connects like this:
<script src="/js/clientapp.js?v=1463417706211" type="text/javascript"></code></pre><br>
1463417706211 - time, i.e., each loading different<br>
if in chrome in the tab Sourses to find this script and add breakpoint, then after a page reload they all fly off for the title due ?v=1463417706211 will be another how to solve the problem?<br>
The website is not mine.</script>
July 9th 19 at 13:25

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