I recall reading a few months ago that Oracle was going to begin "treating" Mac OS X users to adware during Java 8 installs and upgrades. I sort of dismissed it out of hand because I have been dodging scummy adware junk during software installs on Windows PCs for years.
"With the latest release of Java for the Mac, Oracle has begun bundling the Ask adware with default installations as well, changing homepages in the process.
The unwelcome Ask extension shows up as part of the installer if a Mac user downloads Java 8 Update 40 for the Mac. In my tests on a Mac running that latest release of OS X, the installer added an app to the current browser, Chrome version 41. (In a separate test, I installed Java using the latest version of Safari, where it behaved in a similar fashion.)"