Do not malign Thunderbird unnecessarily.

org-contribute.org

@@ -98,13 +98,13 @@ for modification. In this context, "formatted properly" means that the
 patches are included either plainly in the mail text, or as text
 attachments (mime-type text, subtypes "x-patch", "x-diff", or
 "plain"). In particular, binary types or, even worse,
-"application/octet-stream" (the asinine default of some mail programs,
-e.g. Thunderbird) are *not* going to be recognized. Please find out
-how to convince your mail program to send proper attachments. Also, if
-you include the patch inline, please make sure that your mail program
-does not reformat it (although there are plenty of places further down
-the line where that can happen, unfortunately). If you attach the
-patch, then reformatting is not a problem.
+"application/octet-stream" (the asinine default of some mail programs)
+are *not* going to be recognized. Please find out how to convince your
+mail program to send proper attachments. Also, if you include the
+patch inline, please make sure that your mail program does not
+reformat it (although there are plenty of places further down the line
+where that can happen, unfortunately). If you attach the patch, then
+reformatting is not a problem.
 
 ** Sending quick fixes