The above URL shows a leaking call to NS_NewAtom(). The nsCOMPtr<nsIAtom> headerAtom should be assigned using getter_AddRefs. Here's a patch that fixes the leak: Index: mozilla/netwerk/protocol/http/src/nsHTTPResponse.cpp =================================================================== RCS file: /cvsroot/mozilla/netwerk/protocol/http/src/nsHTTPResponse.cpp,v retrieving revision 1.28 diff -r1.28 nsHTTPResponse.cpp 371c371 < headerAtom = NS_NewAtom(headerKey.GetBuffer()); --- > headerAtom = getter_AddRefs(NS_NewAtom(headerKey.GetBuffer()));

nice catch! fixed and will be sneaked in soon... :)

This fix was reviewed by gagan and I checked it in after testing under Purify.

and hence sneaked in.. :)

verified