http://scribbling.net/projects/firefoxextensions/aboutsite/aboutsite.xpi
http://releases.mozilla.org/pub/mozilla.org/extensions/adblock/adblock-0.5.2.056-fx+fl+mz+ns.xpi
http://downloads.mozdev.org/bookmarkshome/bookmarkshome1.4.3.xpi
http://extensions.roachfiend.com/bugmenot.xpi
http://code.mincus.com/extensions/adsense.xpi
http://htmlvalidator.sourceforge.net/mozilla/tidy_firefox_win_076.xpi
http://www.kevinfreitas.net/extensions/linkchecker/linkchecker.xpi
http://downloads.mozdev.org/spiderzilla/spiderzilla.xpi