I don't know if there is an active bug report for this, but for Firefox 8 with the MailTo Helper Application set to Yahoo! Mail, choosing [i]File: Send Link[/i] opens the Yahoo mail form and inserts [b][i]mailto:?To=[/i]<link>[/b] into the [b]To:[/b] field, instead of simply inserting [b]<link>[/b] into the Body. I tried setting up a new MailTo Helper Application via a Javascript similar to those prescribed here: [url]http://www.davidgilson.co.uk/2009/09/make-webmail-firefoxs-default-mail-client[/url], but Firefox did not seem to respond to the script. I also installed GmailDefaultMaker (which also supports Yahoo Mail and several other webmails) and tried to use that to straighten out Firefox's Yahoo Mail setup, but it accomplished nothing. Working with the preferences in About:Config got me nowhere. Editing MimeTypes.rdf with Windows XP Wordpad was promising. (Notepad doesn't work due to the wrong kind of character encoding.) Replacing every instance of "http://compose.mail.yahoo.com/?To=%s" with "http://compose.mail.yahoo.com/?Body=%s" results in [b][i]mailto:?Body=[/i]<link>[/b] being inserted into the Body. That is an improvement, but nowhere could I find enough documentation about MimeTypes.rdf to figure out how to get rid of [b][i]mailto:?To=[/i][/b]. (For documentation, there is [url]http://kb.mozillazine.org/MimeTypes.rdf[/url], but that is incomplete.) Does anyone have a workaround?