User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0
Steps to reproduce:
Run a webserver like
python -m SimpleHTTPServer
with the two files attached, then browse to
Looking in the web console, it shows
Looking in the network tab (and reloading), there is no network request sent to there, but the source code is
xhr.open('GET', url, !$1);
console.log('sending! ' + url);
so it should have been sent.
This is a regression in firefox nightly, I think in the last few days. It worked in older firefox and still works in chrome, that is, the network tab shows a network request sent as expected.