This message in Firefox used to pop up every time I clicked on a zip file.
You have chosen to open
Which is a: BIN file
Firefox 3.x, for whatever reason, greyed out the option for me to tell it not to keep asking me if I wanted to unzip the file, and I’d have to click the “save to file” option every time.
Tired of trying to figure out how to ungrey the greyed-out button, I looked for another solution. I found one in /etc/mime.types, which Firefox, among other things, uses to determine what to do with a file.
sudo vi /etc/mime.types
look for this line:
change it to:
You don’t even need to restart Firefox. Firefox will now just prompt you to save the zip file /only/.