Experiment Type: Pref Flip Study What is the preference we will be changing browser.privatebrowsing.searchUI What are the branches of the study and what values should each branch be set to? - Treatment Variant (old UI) 50%: Value: false The variant group will see the old about:privatebrowsing UI without search (and a lot more text) - Treatment Control 50%: Value: true The control group will see the new about:privatebrowsing search functionality launching in Firefox 66 What version and channel do you intend to ship to? 0.9% of Release Firefox 66.0 Are there specific criteria for participants? No filtering required What is your intended go live date and how long will the study run? Mar 19, 2019 - Apr 30, 2019 (42 days) What is the main effect you are looking for and what data will you use to make these decisions? What is the main effect you are looking for and what data will you use to make these decisions? What metrics are you using to measure success We want to see no negative effects on the following metrics: SAP Search volume Organic search volume Ad clicks Ad displays Do you plan on surveying users at the end of the study? No. Strategy and Insights can help create surveys if needed Who is the owner of the data analysis for this study? Ben Miroglio Will this experiment require uplift? False QA Status of your code: Link to more information about this study: https://experimenter.services.mozilla.com/experiments/search-in-private-browsing-new-tab-impact-study/