debug or not debug

[Judi_bk]

Can someone explain this, getting it a lot, using Firefox

A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue.

Script: https://static.xx.fbcdn.net/rs...RcwDBEelx.js?_nc_x=M8CMD5bTw8C:13

[Drax]

A common problem caused by javascript clashing with something, if it's just started appearing have you installed or updated another program?

Here's the Mozilla (Firefox) support for this issue to start with from many many years ago :(
https://support.mozilla.org/en-US/questions/1022944

Your link comes up with a facebook page (mine) I hope I'm not causing it 

[Judi_bk]

I have never visited your facebook page!  I will try that.  Only new thing I have downloaded on that machine is Firefox and it is mostly happening on Facebook

[Drax]

lol : you do, you probably don't realise it's one of the FB groups I'm involved with 

[Judi_bk]

Of course, I know which one, well its all your fault then