They could have done such experimentation in an unreleased fork of the browser. Or if they needed wider testing, they could have released this separate, experim

They could have done such experimentation in an unreleased fork of the browser. Or if they needed wider testing, they could have released this separate, experimental branch and clearly labeled it so that people would know what they were getting into if they installed it. Mozilla didn't need to force Pocket on so many Firefox users who wanted absolutely nothing to do with it.