JavaScript Object Management - Archive of obsolete content
in order to access a file messagecount.js in this directory, the url would be: resource://xulschoolhello/messagecount.js code modules are regular js files, so there's nothing new in regards to naming or file types.
... module files can be imported to a chrome script or to other code modules with the following line: components.utils.import("resource://xulschoolhello/messagecount.js"); when using components.utils.import, code modules must be loaded using a file: or resource: url pointing to a file on the disk.

nsIMsgFolder
nsmsgdispositionstate_none -1 nsmsgdispositionstate_replied 0 nsmsgdispositionstate_forwarded 1 allmessagecountnotifications 0 turn notifications on/off for various notification types.
... currently only supporting allmessagecountnotifications which refers to both total and unread message counts.

XPCOM Objects - Archive of obsolete content
if (!this._singletonobj) { this._singletonobj = messagecounter; } return this._singletonobj.queryinterface(aiid); } }; if we wanted a class that can be instantiated, instead of a singleton service, the factory would look like this: var counterfactory = { createinstance: function(aouter, aiid) { if (aouter != null) { throw cr.ns_error_no_aggregation; } return (new counter()).queryinterface(aiid); } }; the instruct...

Events
ondisplayingfolder a folder gets displayed onfolderloading a folder is being loaded onleavingfolder a folder is being unloaded, includes deletion onloadingfolder a folder is being loaded onmakeactive a folderdisplaywidget becomes active onmessagecountschanged the counts of the messages changed onmessagesloaded the messages in the folder have been loaded onmessagesremovalfailed removing some messages from the current folder failed onmessagesremoved some messages of the current message list have been removed onsearching a folder view derived from a search is being loaded, e.g...

Mail composition back end
ns_imethod onstartsending( pruint32 atotalmessagecount) = 0; - the total messages to be sent createandsendmessage the onprogress interface is called with progress notification of the send later operation.