Okay, first off, I had the same problem that another person listed in this thread: https://support.mozilla.org/en-US/questions/991038?esab=a&as=aaq Following the links Cor-el posted as an answer, I was lead to these pages: http://www.oracle.com/technetwork/java/javase/downloads/index.html and http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html Mostly, these pages seem to solve the issue, however, one small problem still exists for me: Due to a combination of not having dealt with this issue in a long time, and being not at all computer savvy, I'm not sure which exactly I should download. I'm pretty sure that it's Java JRE 8, but I want to be sure so I don't cause a bigger problem than I already have. Also, clicking on the Java JRE 8 button leads me to a list of download links, two of which are for "Windows x64", which is what I have. One ends in ".exe", and one ends in ".tar.gz". Which do I download?