Firefox now has a built-in debugger (which appeared in Firefox 15, released in August 2012). This uses a new debugging back-end built by Mozilla's JS and devto

Firefox now has a built-in debugger (which appeared in Firefox 15, released in August 2012). This uses a new debugging back-end built by Mozilla's JS and devtools teams, totally separate from the older Firebug debugger code. It should be more robust, and has new features like remote debugging of code running in Firefox for Android. More info at https://hacks.mozilla.org/2012/07/debugger-responsive-design-view-and-more-in-firefox-aurora-15/ https://hacks.mozilla.org/2012/07/debugger-responsive-design...