NPAPI

Updated: 10/11/2017 by Computer Hope

NPAPI, also known as Netscape Plugin Application Programming Interface, is a deprecated API (application programming interface) used by some web browsers to allow plugins. It was created by John Warnock and Allan Padgett at Adobe in 1995 for the purpose of integrating a PDF (Portable Document Format) viewer into Netscape Navigator 2.0.

Browsers with NPAPI support

Browsers that have support for plugins written using the NPAPI include:

Safari
WebOS Isis.
Konqueror
Opera
Qupzilla.
Odyssey web browser on MorphOS.
Mozilla Firefox, but with only partial support in versions after Firefox 30.
Internet Explorer previous to version 5.5 SP2.

Computer acronyms, Software terms