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| Shield Variants is a feature that asks a random population of users to help us try out new products, features, and ideas. This feedback helps Mozilla to make more informed product decisions based on actual user needs
| | #REDIRECT [[Firefox/Recipe_Server/Shield_Studies]] |
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| Shield Variants are available on channels. Participation in an individual study is opt-in and any and all data being collected will be declared prior to joining the study. After confirming willingness to participation, a self expiring add-on will be installed on the user's machine. At the end of the study period, the add-on will expire and return the user's system to the previous state. When the add-on expires, the user will be asked to fill out a survey based on their experience.
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| Shield Variants can be targeted at various populations by specifying conditions in a [[Firefox/Recipe_Server|Recipe]]. Additional configurations and conditions can be set through the add-on for the individual study.
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| == Product Approval ==
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| Product approval is required to run a Shield Variant. Shield Variants must be approved by a Firefox product manager and a core member of the Shield Team. For experiments which have no user-visible effects, this approval is trivial.
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| == Data Collection ==
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| By default, Shield Variants will collect this data:
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| * Firefox was used
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| * Usage hours
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| * Study info: Variation Name, Study Name
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| Mechanism:
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| - at STARTUP, SHUTDOWN, INSTALL, UNINSTALL,
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| - send a `x-shield-trials` packet containing the Unified Telemetry Environment.
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| Additional measures may be added to individual studies pending approval from a data steward. All data collected will be disclosed prominently to the user at the time of consent.
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| == Engineering ==
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| Shield Variants are a special type of [https://developer.mozilla.org/en-US/Add-ons/Bootstrapped_extensions restartless extension]. They can do anything a regular restartless extension can do.
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| === Lifecycle ===
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| Shield Variants live for a fixed period and are uninstalled by the system at the end date or after the specified elapsed time.
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| === Extension Signing ===
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| Shield Variants need to be signed to run in FF 42+, just like all other add-ons.
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| == Staging ==
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| Shield Variant staging is performed by the core Shield Team with QA by Chris Hartjes.
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| == Final Deployment ==
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| Final deployment of a Shield Variant must be approved by a Firefox Product Manager and the core Shield Team.
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