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Christoph Kerschbaumer authored
Bug 1593832: Enforce XFO and frame-ancestors in parent process if fission is enabled and in content if running in regular mode until we can determine whether a load results in a download in the parent process. r=bzbarsky,jkt Differential Revision: https://phabricator.services.mozilla.com/D53955 --HG-- extra : moz-landing-system : lando
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