> To start, this experiment will only be available to Nightly users, and the AI functionality will be entirely optional. There are at least two ways of reading

> To start, this experiment will only be available to Nightly users, and the AI functionality will be entirely optional. There are at least two ways of reading the scope of the initial qualifier, but, given Mozilla's fondness for trying to force certain features they like on users (cough Pocket cough Mr. Robot cough), I don't like that "the AI functionality will be entirely optional" is preceded by "to start."