+++ This bug was initially created as a clone of Bug #1226441 +++ In gecko, activate jobs are not synchronized with a queue as described in the spec. This means we can have racing activating service workers. This is not a problem at the moment since we don't wait for the worker to finish activating in Handle Fetch either, but it might be worth investigating later on.
The activation queue no longer exists in the service worker spec. I'm implementing the new queuing approach over in bug 1256428.
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