info: executing 'test-content-worker.test:sample' info: pass: window starts by loading about:blank info: pass: window is now on the right document ... var myLocation = window.location.toString ... TypeError: window.location is undefined info: pass: worker.url works error: TEST FAILED: test-content-worker.test:sample (timed out) We are facing another platform regression. Following snippet is still working on stable release but not on Aurora, nor nightly: var Cu = Components.utils; var s = Cu.Sandbox(content, { sandboxPrototype: content }); Cu.reportError( s.location + " - "+ content.location ); `s.location` is undefined whereas it should be equal to `content.location`.

https://tbpl.mozilla.org/?noignore=1&jobname=jetpack&rev=fafd873d469c All tests appear to be passing again on Nightly with bug 751077 landed.