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Thomas Wisniewski authored
Bug 1595086 - also freeze the presshell when setActive(false) is called to stop requestAnimationFrames; r=smaug also freeze the presshell when setActive(false) is called to stop requestAnimationFrames Differential Revision: https://phabricator.services.mozilla.com/D55343 --HG-- extra : moz-landing-system : lando
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