The browser shows a progress bar as it moves, even when the page is loaded

Question

I have a spring based web application.

Request Stream:

jsp -> interceptor chain -> processor -> service -> tao -> database

and back.

Javascript is also used in JSP.

Scenario:

A list of interactive products is displayed. When you click on any product, product information is selected and displayed on the tabs on one page. (Javascript Tabber)

By clicking any other product, the details of the new product will be displayed and displayed.

However, even though all the parts are fully loaded, the progress bar continues to show progress.

The accepted answer in the browser showing half the progress bar even after the page is fully rendered shows that this is due to some control. But how to understand it.

How to get to this problem? A pin pointing to a line or block of code, if you say?

I use Internet Explorer and CANNOT use firebug, etc., while working in a limited environment.

How to solve this using IE?

Also, someone can explain / clarify the answer in another question. This does not help at all for javascript beginners like me.

Thank you for reading.