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Mike Conley authored
Bug 1560590 - Add Telemetry event probes to determine if users tend to move or resize the Picture-in-Picture window after opening it. data-review=chutten,r=JSON_voorhees Depends on D36359 Differential Revision: https://phabricator.services.mozilla.com/D36360 --HG-- extra : moz-landing-system : lando
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