Question: Internet explorer 11 (latest) crashes with the message "Internet Explorer has stopped working" when opening developer tools and and I have my site open.
Chrome, Edge doesn't give the problem.

All the functionality in my site works correctly.

This is only with my site (intranet site)

[![enter image description here](https://i.stack.imgur.com/tCOfY.png)](https://i.stack.imgur.com/tCOfY.png)

When I debug it I get

> 
> Unhandled exception at 0x5B514C32 (mshtml.dll) in iexplore.exe: 0xC00000FD: Stack overflow (parameters: 0x00000001, 0x06EC2FFC).
> 
> 
> 

How can I troubleshoot what in my site causes this behavior?

I have tried resetting Internet Explorer and disabling all add-ins but because the issue is not to do with other sites I can only think the issue is to do someone specific in the html/ javascript in my site.

Answer: 
My laptop has 2 graphics processors: an integrated one and a a higher end nvidia one. For me the solution was to force IE11 to use the nvidia gpu. You can do this in windows by going start and searching for 'Graphics Settings'. In there you can add both the x86 and x64 iexplore.exe files and set the to 'High Performance'. Once I did this IE11 no longer crashed when I pressed F12.

[![Graphics Settings](https://i.stack.imgur.com/tEDvp.png)](https://i.stack.imgur.com/tEDvp.png)
Removing duplicate CSS from Child iFrame JSP worked for me. However I need that CSS and I removed it for Debugging only and after debugging I enabled it again

Edit:
I have fixed the issue, there was a font-awesome css which was already included in parent JSP and I had included it in child JSP as well. I removed it from child JSP and it worked.