How to see Javascript error messages in FireFox?

Some browsers such as IE (Internet Explorer) will show the javascript error messages as an alert Dialog window.
Even if we choose not to show this error message it will be shown as yellow icon at left bottom corner of the browser window.

But FireFox won't show this javascript error messages. If you want to see this messages you have to open error console window by going thro' Tools->Error console (Ctl+Shift+J) in the browser window.

If you see lot of error messages there, then just click Clear to remove the existing error messages.


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