No chrome package registered for chrome://editor/content/editorInlineSpellCheck.js .
No chrome package registered for chrome://editor/content/editor.js .
No chrome package registered for chrome://editor/content/editorOverlay.xul .
Warning: Failed to load overlay from chrome://editor/content/editorOverlay.xul.
Source File: chrome://messenger/content/messengercompose/messengercompose.xul
Line: 0
Error: EditorCleanup is not defined
Source File: chrome://messenger/content/messengercompose/MsgComposeCommands.js
Line: 1525
Error: Unknown namespace prefix 'html'. Ruleset ignored due to bad selector.
Source File: chrome://messenger/skin/messageBody.css
Line: 55