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Thomas Wisniewski authored
Bug 980902 - log a warning recommending the use of sendBeacon during unload instead of synchronous XMLHttpRequest; r=Ehsan log a warning recommending the use of sendBeacon during unload instead of synchronous XMLHttpRequest Differential Revision: https://phabricator.services.mozilla.com/D23799 --HG-- extra : moz-landing-system : lando
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