Janar 1998 ita ce kuma watan da Netscape ya fara aikin Mozilla na tushen budewa. Netscape ya fito da lambar tushe na Netscape Communicator 4.0 a cikin fatan cewa zai zama mashahurin aikin budewa. Ya sanya wannan lambar a ƙarƙashin lasisin jama'a na Netscape, wanda yayi kama da GNU General Public License amma ya ba Netscape damar ci gaba da buga aikin mallakar mallaka wanda ke ƙunshe da lambar da aka saki a bainar jama'a. Koyaya, bayan da ya saki lambar Communicator 4.0 ta wannan hanyar, Netscape ya ci gaba da aiki akan Communicator 4.5 wanda aka mai da hankali kan inganta imel da ayyukan kamfani. Daga ƙarshe ya zama a bayyane cewa mai bincike na Communicator 4.0 yana da wahalar haɓakawa, kuma an dakatar da haɓaka tushen buɗewa akan wannan codebase. A maimakon haka, buɗewar buɗewa ta koma zuwa mai bincike na ƙarni na gaba wanda aka gina daga karce.
Ƙungiyar Netscape