I've been getting this every time I try to download a JDK 8 update to my MacBook.
- First, I go here: http://www.oracle.com/technetwork/java/javase/downloads/index.html
- I click the download location and go here: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
- I accept the license agreement and click jdk-8u25-macosx-x64.dmg, which sends me here: https://download.oracle.com/otn-pub/java/jdk/8u25-b17/jdk-8u25-macosx-x64.dmg
As you can tell, I already started downloading the .dmg, but I have not installed it yet. I'm running on Firefox 34.0.
Here is the certificate: