CACHE MANIFEST
http://mochi.test:8888/tests/SimpleTest/SimpleTest.js
http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/offlineTests.js

# The following item doesn't exist, and will cause an update error.
http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/doesntExist.html