They have, many of them gave up earlier, e.g. https://github.com/estivo/Instantfox/issues/129#issuecomment-250919830 https://github.com/estivo/Instantfox/issue

They have, many of them gave up earlier, e.g. https://github.com/estivo/Instantfox/issues/129#issuecomment-250919830 https://github.com/estivo/Instantfox/issues/129#issuecomment... https://addons.mozilla.org/en-US/firefox/addon/classicthemerestorer/reviews/834437/ https://addons.mozilla.org/en-US/firefox/addon/classicthemer... http://www.downthemall.net/re-downthemall-and-webextensions-or-why-why-i-am-done-with-mozilla/ http://www.downthemall.net/re-downthemall-and-webextensions-...