One of the comments from the accepted answer says that the Mozilla was the codename for Netscape, link: https://stackoverflow.com/questions/1114254/why-do-all-brows...
ISTR that Netscape used to have in it's README or INSTALL (or maybe an "about"-like menu entry) a note that the name of the browser is pronounced Mozilla while only being spelled N-E-T-S-C-A-P-E.