Moreover, Navigator 2.0 plug-ins were given no access to the existing page background, which meant that PNG transparency would be completely ignored. That meant that even if PNG plug-ins were written for both supported platforms, and even if a majority of users downloaded and installed a plug-in, it would be useless for standard HTML-only pages using Netscape's proprietary EMBED tag would invoke the custom code.
#IBROWSE VS IEXPLORER CODE#
Alas, even that was fatally flawed from an image-support perspective: Navigator's native image-handling code (via the HTML IMG tag) had no provision for handing off unknown image types to plug-ins. Navigator 2.0 did offer the possibility of platform-specific, third-party PNG support via Netscape's new plug-in interface, but only for Windows and Macintosh.
Version 1.1N was released in the spring of 1995, at roughly the same time as the frozen PNG specification, but despite the hopes and efforts of the PNG developers, the first Navigator 2.0 betas shipped later that year with animated GIF support rather than PNG. Netscape's Navigator browser, which originally shipped standalone but more recently has been bundled as part of the Communicator suite, supplanted NCSA Mosaic late in 1994 as the standard browser by which all others were measured.
Collectively referred to as “the Big Two,” these browsers' level of support for any given feature largely determines the viability of said feature. WWW BrowsersĪlthough there are dozens of web browsers available, most of which have supported PNG since 1995 or 1996, for the vast majority of users and webmasters there are only two that count: Netscape Navigator and Microsoft Internet Explorer. It complements the more detailed and explanatory information presented in this chapter.
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