[HTTPS-Everywhere] Mozilla downloads broken in 4.0dev3

[Robert]

Starting with 4.0dev3, downloads of Firefox and Thunderbird fail from mozilla.

Downloads come from download.cdn.mozilla.net and the Mozilla rule in
https-everywhere results in the following error


download.cdn.mozilla.net uses an invalid security certificate.

The certificate is only valid for the following names:
  a248.e.akamai.net , *.akamaihd.net , *.akamaihd-staging.net