There are such projects already, even started long before the NPAPI discussion:<p><a href="http:&#x2F;&#x2F;kmeleonbrowser.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;kmeleonbrowser.org&#x2F;</a><p><a href="http:&#x2F;&#x2F;www.gnu.org&#x2F;software&#x2F;gnuzilla&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.gnu.org&#x2F;software&#x2F;gnuzilla&#x2F;</a><p><a href="http:&#x2F;&#x2F;www.seamonkey-project.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.seamonkey-project.org&#x2F;</a><p>All based on the Gecko engine. I wonder what their standpoint is about NPAPI, though.<p>I use kmeleon and I am quite happy with it.