An internal web site at my company has a page that takes rather long time to load. When I view the page using IE 11, the following message is displayed:
[domain] is not responding due to a long-running script
The message dialog has a "stop script" button but no "debug" button.
This site uses a large amount of JavaScript scripts built in the past and I would need to debug it to try to determine which one of them is causing this problem.
My problem is that IE does not allow me to launch the F12 developer tools until after the page has loaded, and if I open the F12 tools before loading the page and then reload the page, the debug tools window disappears.
The questions I would like to ask:
- How can I get the F12 tools to stay open to profile the opening of the page?
- Or is there a way to debug scripts running on page load using Firefox (v.45.8) debugging tools?