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)
As both my fellow developer and I came across this question when trying to solve this issue, and still not having a clear answer to our problem until digging into the post by Microsoft in MrMcPlad's answer, I decided to make my first contribution to stackoverflow.

If you have an iFrame in your site using the same stylesheet as the main frame, it will cause this crash to occur. To debug it, remove one of the stylesheet links, and you'll be able to debug again.

Thanks, MS for not fixing a bug in the arguably superior browser. Or, you know, making it challenging for developers who want to support customers / users that don't all have Windows 10.