Lately my Google Chrome browser at the office pretty much always showing the "loading" spinner when I am using Gmail.
I haven't noticed any Gmail features that aren't working nor unloaded portions of the page.
I have AdBlock disabled on the domain but the company's outbound web proxy may be blocking something, so I can't be sure.
How can I tell what piece of the page Chrome is failing to load?
(Note that this question is related to another similar problem, but I am wanting to know specifically how to identify the failing load.)