I have selected the following settings to no avail:

"Choose how Firefox handles the files you download form the web or the applications you use while browsing:" I have set every file type to "always ask", yet when I click on a .kmz, it always prompts me to save it when I want to open it with Google Earth instead. I also tried the setting to default to opening with Google Earth, yet it still prompted me to save the file. I have rebooted to try to make this setting kick in and still no luck. Perhaps this is because the option on the Firefox list is .kml, not .kmz? How do I get it to give me a choice or default to opening with Google Earth?