[mbrownnyc]

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

[Kronopath]

You didn't read the linked article. They say that the option will be available in Firefox 41, but Firefox 42 will have no such override.

[mbrownnyc]

Thanks for pointing that out. Too bad.