* Not yet working but it will!

x11-plugins/multiproxy-switch/Manifest

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+DIST multiproxy_switch-1.43-fx+tb+mz.xpi 76987 RMD160 2c7d8bdb5cff3311c6326d923ccfa0576f67b461 SHA1 7ee4292126df8e7185e52f18befc6b5102d64463 SHA256 1ba829babd463a1aee3e733c42383db330de1d0ae2578c5085c03611d1ff7fca
+EBUILD multiproxy-switch-1.43.ebuild 1256 RMD160 364297324537c3c42a4e85c2a50d17dbbfc97dfd SHA1 642353f1b4f856936dba81bc8cd60194653c2a42 SHA256 2e78cafbaca8999ce2ae8eaf73cae39a7751ff5ab0f0f6d69952ee788d21f85d

x11-plugins/multiproxy-switch/multiproxy-switch-1.43.ebuild

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+# Copyright 1999-2004 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+inherit mozextension multilib eutils
+
+MY_P="${PN//-/_}-${PV}-fx+tb+mz"
+DESCRIPTION="A Firefox extensions from the firecat framework."
+HOMEPAGE="http://www.security-database.com/toolswatch/FireCAT-Firefox-Catalog-of,302.html"
+SRC_URI="${MY_P}.xpi"
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 x86"
+IUSE=""
+RESTRICT="fetch"
+RDEPEND="|| (
+	>=www-client/mozilla-firefox-bin-3.0.0
+	>=www-client/mozilla-firefox-3.0.0
+)"
+DEPEND="${RDEPEND}"
+
+#S="${WORKDIR}"
+
+pkg_nofetch() {
+        elog "Please download extension from:"
+        elog "https://addons.mozilla.org/en-US/firefox/downloads/file/59124/${MY_P}.xpi?confirmed"
+        elog "Then put the file in ${DISTDIR}/${SRC_URI}"
+}
+
+src_unpack() {
+	echo ${A}
+	xpi_unpack "${A}"
+#	epatch "${FILESDIR}/${MY_P}.patch"
+}
+
+src_compile () {
+	einfo "Nothing to compile"
+}
+
+src_install () {
+	declare MOZILLA_FIVE_HOME
+	if has_version '>=www-client/mozilla-firefox-1.5.0.7'; then
+		MOZILLA_FIVE_HOME="/usr/$(get_libdir)/mozilla-firefox"
+		xpi_install "${S}/${MY_P}"
+	fi
+	if has_version '>=www-client/mozilla-firefox-bin-1.5.0.7'; then
+		MOZILLA_FIVE_HOME="/opt/firefox"
+		xpi_install "${S}/${MY_P}"
+	fi
+}