Phame Blogs Leave it to the prose
Leave it to the prose
Readers Department Development Blog


Written by phuedx on Aug 16 2017, 12:58 PM.

The Reading Web team recently discovered a bug in Firefox wherein a load event is fired when Firefox loads certain pages from its Back-Forward Cache (BFCache). To JavaScript on those pages, this event is a second load event (the first having been fired before the user navigated away from the page). This proved to be problematic for the cornerstone of our instrumentation, the EventLogging extension and delayed the deployment of Page Previews for approximately three months.

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Updates from WMF's Readers Department.