Firefox – how to re-enable “unresponsive script” warning in Firefox

command line options can be found http://kb.mozillazine.org/Command_line_arguments and developer.mozilla.org/En/Command_Line_Options

but apparently the -console argument is windows only. Not sure if the lack of debug output launching it from a console on linux is because debug output is disabled for production compilations or some other strange reason.

There is a checkbox for "Do this automatically for files like this from now on." Selecting that checkbox will cause it to always go straight to saving the file.