This is a developer extension for firefox & thunderbird that provides a better alternative to using the dump statment. It breaks up debug statements to be unique per extension or project and let's you view them independantly in a clean colsole

Now fire up your Firefox or Thunderbird, click Tools > Debug Logger and trip this debug statment in your extension. You should see 'Hello World' pop up in the console.

Code Breakdown
Line 1 Get the DebugLogger service
Line 2 Register your app with the logger (a logger object is returned). The name you provide should be unique and specific to your app.
Line 3 Send the debug message "Hello World" at a debug level of 3. The debug level is very important, it helps you mask certain debug statments from the consol; where 1 is most generic and 5 is the most specific. In the console you can choose what level of debug statments to watch by selecting the level from the drop-down menu.

Using the console
Click Tools > Debug Logger to open the colsole.
Select what app you want to watch by selecting it's name from the first drop-down menu
Limit the level of debug statments by selecting a number from the second drop-down menu (5 shows all messages, 1 shows only the broadest messages)
The Clear button empties all the log messages for the selected project (loggers)
The Clear All button empties log message for all projects (loggers)
Pause will stop collecting log messages from all projects (loggers)
Options let's you set the maximum log buffer size. The loggers will only save up to a certain number of log messages, this dialog will let you turn that up or down.
When you click on a row (or ctrl-click, shift-click for many rows) you can copy it/them by pressing ctrl-C

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