I'm encountering a problem regarding handling of attachments with Thunderbird (9.0.1, Windows 7).
I've set Thunderbird to open HTML files with Firefox. But currently, Thunderbird adds a ".xht" extension to the attachment file when saving temporarily (so, the filename "
foo.html" now is "
foo.html.xht") before passing it to Firefox. Thus, Firefox tries to parse the HTML file as XML and fails, since the attachments often aren't valid X(HT)ML, but old, ugly HTML.
If I save the attachment manually, Thunderbird doesn't touch the file extension, and thus Firefox doesn't have a problem displaying the "old" HTML. But when saving manually, I have to open the Windows Explorer, navigate to the download folder, and double-click manually.
So, how do I tell Thunderbird not to change the file name (especially the extension) when saving the file temporarily?