My extension currently can’t be ported to WE. This extension uses about:config to customize security/privacy/display options (network.dns.disablePrefetch, signon.autofillForms, geo.enabled, and 30 others). I provides buttons to enable/disable them on the fly.
I read in the FAQ (https://wiki.mozilla.org/WebExtensions/FAQ#Will_I_have_access_to_about:config_or_the_preferences.3F) that you plan to implement APIs for each feature.
However, with the planned removal of old extensions (https://blog.mozilla.org/addons/2016/11/23/add-ons-in-2017/), I’m quite sure that by the end of 2017, all specific security/privacy/display APIs I need won’t be implemented.
So, with the announcement of old extension removal, do you plan to change your ideas, and provide an API to access to about:config, so we can port customization extensions?
Otherwise, those extensions will directly go to the trash with Firefox version 57.