XF 2.3 Service_worker.js Spam

ISPr_Winter

Member
Licensed customer
Recently I've noticed a number of IP addresses on the forum that seem to have thousands of empty apache access log entries for the service_worker.js file (usually every few seconds). Normally I'd expect to see service_worker.js called alongside forum page loads, but in this case there's just lots of service_worker.js entries with almost no associated page loads for any other content (maybe one proper forum page load in a sea of service_worker.js requests over several hours).

At first I thought it might be some new kind of abuse (never seen this before and I do pay close attention to logs/activity), but then I spotted it happening on my own IP address once too and couldn't figure out why. Anybody have any ideas?
 
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