violentmonkey: Firefox does not stop on keyword 'debugger'

I don’t know whether it is VM issue or Firefox issue, but if I put debugger keyword inside my userscript to debug it, Firefox won’t stop. I have to debug only using console.log statements. It is very inconvenient.

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 20 (10 by maintainers)

Most upvoted comments

Assuming you’ve already switched to content mode, there’s another option in devtools settings that you need to enable:

tophf on Mar 15, 2020

debugger statement is a part of JavaScript language, Violentmonkey doesn’t have influence over that.

You can switch your userscript to content injection mode for better debugging in Firefox, but for page injection mode you’ll have to use Chrome because sensible debugging of such scripts is not implemented in Firefox at all.

BTW devtools debugger allows you to set breakpoints manually in its source code editor without the need to use debugger statement. In Chrome it works for both injection modes, in Firefox it works only in the content mode.

tophf on Mar 15, 2020