Error Console
From MozillaZine Knowledge Base
You can output information to console using the following method:
- Declare global variable gConsoleService: var gConsoleService;
- Initialize it on load: gConsoleService = Components.classes['@mozilla.org/consoleservice;1'] .getService(Components.interfaces.nsIConsoleService); (note, you can also use toJavaScriptConsole() function to open JavaScript console on startup)
- Define a function: function MyApp_logMessage(aMessage) { gConsoleService.logStringMessage('MyApp: ' + aMessage); }
- Use it like here: MyApp_logMessage('Initialized.');
See also: Using dump()
Reference: [1]