Mozilla Fixes 25-Year-Old Bug Predating Firefox

Mozilla resolves a 25-year-old bug from the Netscape Navigator era, showcasing their commitment to improving Firefox

Recently, a developer discovered that Mozilla fixed a bug that had existed for 25 years, even before the creation of the Firefox browser, which was first released on November 9, 2004.


This bug traces back to the days of Netscape Navigator. The Mozilla community was formed in 1998, a year before AOL acquired Netscape Communications. Firefox is considered the spiritual successor of Netscape Navigator.

Firefox bugs

hidden preferences

Netscape Navigator once dominated the browser market but lost to Internet Explorer in the first browser war. Its market share dropped from 90% in the mid-1990s to less than 1% by the end of 2006.

Mozilla community

Several other 25-year-old Firefox bugs have also been fixed, including one related to implementing transparency and semi-transparency using “hidden preferences.”

Firefox was released in November 2004, stemming from a project initiated by Mozilla community members in 2002, originally called “Phoenix.”

Netscape’s development continued until December 2007 when AOL announced it would stop support in early 2008.

Notable contributions from Netscape include JavaScript by Brendan Eich and the cookie invention by Lou Montulli, as well as the development of the SSL protocol for secure online communication.

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Mozilla Fixes 25-Year-Old Bug Predating Firefox

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