To note, there is a client-side workaround that allows whitelisting of ALL unsigned extensions (they might consider creating a whitelist of UUIDs or something "

To note, there is a client-side workaround that allows whitelisting of ALL unsigned extensions (they might consider creating a whitelist of UUIDs or something "humans" can handle like the name of an extension). I was able to change the following and uBlock and Ghostery immediately started working in the "Aurora" build: go to about:config ; set xpinstall.signatures.required = false