Firefox and NS_ERROR_NOT_IMPLEMENTED
This will only interest web developers.
Using Firefox 3.0.10 on XP, with the firebug console open, I kept noticing seemingly arbitrary errors like this:
[Exception... "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIRequest.name]” nsresult: “0×80004001 (NS_ERROR_NOT_IMPLEMENTED)” location: “JS frame :: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsLoginManager.js :: anonymous :: line 282″ data: no]
file:///C:/Program%20Files/Mozilla%20Firefox/components/nsLoginManager.js
Line 282
I finally realized this was triggered by using the right-click context menu option “View Selection Source” (which is very useful for examining generated markup, e.g. after scripted DOM manipulation). It’s a minor bug in Mozilla’s code that seems harmless enough.
Anyway thought I’d share in case anyone else is scratching their head wondering why this error is polluting their console logs.
