Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Opening devtools make tab unresponsive

  • 1 reply
  • 0 have this problem
  • 3 views
  • Last reply by zeroknight

more options

I am developing a website (using AstroJS, but i don't think that's the problem) and since yesterday I am experiencing issues when opening devtools. Once I open devtools the whole FF tab becomes unresponsive, I cannot even refresh the page until they are done loading. I can change devtool tabs from 'inspector' to 'console' to 'network' etc but especially 'network' and 'debug' tabs are blank.

I run a 'performance' capture and got these results. In the test I have only opened the devtools and switched to the inspector tab which is unresponsive. The CPU usage is at around 90% however, I don't really know how to read the finding and understand what the problem is.

So anyone that can help me understand what is going on here?

I am developing a website (using AstroJS, but i don't think that's the problem) and since yesterday I am experiencing issues when opening devtools. Once I open devtools the whole FF tab becomes unresponsive, I cannot even refresh the page until they are done loading. I can change devtool tabs from 'inspector' to 'console' to 'network' etc but especially 'network' and 'debug' tabs are blank. I run a 'performance' capture and got [https://profiler.firefox.com/public/rsz6dx1v45m8d4yxyymd9vsx4acw0v1xq2p5g80/calltree/?globalTrackOrder=bc0wa&hiddenGlobalTracks=1w8&hiddenLocalTracksByPid=17464-0w2~15252-0~4872-0~8732-0~12200-013&implementation=js&thread=e&v=10 these] results. In the test I have only opened the devtools and switched to the inspector tab which is unresponsive. The CPU usage is at around 90% however, I don't really know how to read the finding and understand what the problem is. So anyone that can help me understand what is going on here?

Modified by cor-el

All Replies (1)

more options

Try clearing any breakpoints or debugger statements. Click the "Deactivate breakpoints" button in the top-right corner, next to the gear icon.