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Netscape Plugin Application Programming Interface (NPAPI) is a deprecated application programming interface (API) for web browser plugins, initially developed for Netscape Navigator 2.0 in 1995 and subsequently adopted by other browsers. In the NPAPI architecture, a plugin declares content types (e.g. "audio/mp3") that it can handle. When the ...
Cross-platform Mozilla Firefox support for Silverlight was removed in Firefox 52 released in March 2017 when Mozilla removed support for NPAPI plugins, [41] [42] bringing it in-line with the removal of NPAPI plugin support in Google Chrome.
Pipelight is a compatibility layer that allows NPAPI plugins designed for Windows to run on Linux. It is based on a modified version of Wine. It currently supports Silverlight, Flash Player, Unity 3D, and Widevine. There is experimental support for additional plugins such as Shockwave Player.
Pale Moon is built upon the Unified XUL Platform (UXP), a cross-platform, multimedia application base that was forked from Mozilla code prior to the introduction of Firefox Quantum. [18] [19] UXP is a fork of the Firefox 52 ESR platform that was created in 2017 due to XUL/XPCOM support being removed from the Firefox codebase. [20]
On April 14, 2015, Google released Chrome v42, disabling the NPAPI by default. This makes plugins that do not have a PPAPI plugin counterpart incompatible with Chrome, such as Java, Silverlight and Unity. However, NPAPI support could be enabled through the chrome://flags menu, until the release of version 45 on September 1, 2015, that removed ...
K-Meleon 0.7 with a simple "Hello World" macro, the optional Tango theme, and several NPAPI plugins installed. K-Meleon 0.7 was released with the Mozilla 1.0 engine in October 2002. [27] Despite AOL disbanding upstream parent company Netscape in 2003, the development of K-Meleon continued.
Flashpoint Archive (formerly BlueMaxima's Flashpoint) is an archival and preservation project that allows browser games, web animations and other general rich web applications to be played in a secure format, after all major browsers removed native support for NPAPI/PPAPI plugins in the mid-to-late 2010s as well as the plugins' deprecation.
In middle-old Firefox and Thunderbird versions, the install script has been replaced by a chrome manifest and a RDF file (install.rdf). Since Firefox version 45, the only mandatory file is manifest.json. Since Firefox 1.0, XPIs from sites other than Mozilla Add-ons are blocked by default.