My operating system is Windows 8. I have tried all that was recommended here and nothing works. When I try to set waterfox as my default browser, nothing happens. Every time I go online it tells me waterfox is not my default browser. This has only been in the last couple of weeks, so I am guessing it has something to do with the last update, but not sure. Either way, before the update it was fine, after the update it was not.