The one that blocks all the schmutz.
You got to go and read the story about Blake Ross’ grandfather and Firefox – a rabbi is involved too! :))
This is how you do real ‘marketing by family’!
btw, my mother and my aunt both call the firefox on their machines mozarella – because they mix up the Firefox and the Mozilla Thunderbird. They refer to the latter as ‘the red thing’. It is just like they say string to the control key (which is “Steuerung” in German and therefore STRG). And they don’t talk to one another about computer, the independently came up with it.
Like they called it on the one American Copywriter podcast: sometimes words and concepts just are grabbed by everyone because it lies in the air. :))