My experiment API is undefined on Beta

[leplatrem]

• Context:

I wrote a small addon to help the Firefox product-integrity team validate the Remote Settings feature. It basically exposes some Gecko internal stuff to the addon.

• Where is your experiment located? Code is here: https://github.com/leplatrem/remotesettings-pi/tree/v1.0.0/extension

• Can you provide a brief summary of what it does?

It exposes the RemoteSettings.get() and RemoteSettings.onSync() API available in Gecko https://firefox-source-docs.mozilla.org/services/common/services/RemoteSettings.html

• What's your issue?

It works like a charm on Nightly when I load it via about:debugging.

On Beta, the experiments.remotesettings is undefined.

Note: the addon is not signed.

I would like to know why (I think @rpl told me already but I forgot). Maybe an entry in the FAQ would be helpful.

Thanks!!

[aswan]

On Nightly and Dev Edition, you can install unsigned experiments if you flip two preferences: xpinstall.signatures.required and extensions.legacy.enabled. Unsigned experiments cannot be installed on beta or release regardless of any preference settings.