<<< ECU-BUG-ebuild_missing_eclasses >>>
  6|www-client/firefox-bin|firefox-bin-68.11.0.ebuild|desktop|tripolar@gmx.at:mozilla@gentoo.org:proxy-maint@gentoo.org
  6|www-client/firefox-bin|firefox-bin-79.0.ebuild|desktop|tripolar@gmx.at:mozilla@gentoo.org:proxy-maint@gentoo.org
<<< open bugs >>>
  https://bugs.gentoo.org/670336 =www-client/firefox-bin-63.0.1-r1_installs_both_/opt/firefox/firefox_and_/opt/firefox/firefox-bin
  https://bugs.gentoo.org/687736 kde-plasma/plasma-browser-integration_with_www-client/firefox-bin_on_profile_17.1_-_&quot;Failed_to_connect_to_the_native_host._Make_sure_the_'plasma-browser-integration'_package_is_installed.&quot;
  https://bugs.gentoo.org/705940 &gt;=www-client/firefox-bin-71.x_does_not_look_in_/usr/lib64/nsbrowser/plugins_for_plugins