HTTPS-E 4.0.3 on Firefox 36 does not encrypt www.ted.com
In Search box paste text: ted (buggy) and turn on "ted" filter then visit the www.ted.com and you will see that http://www.ted.com is used instead o httpS://www.ted.com "ted" filter should include the default www.ted.com site.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information