I just tried the unit tests packed with the cesium 1.8 archive and it says there are some failures.
Under Firefox, 12 when I run "all tests", 69 when I run "with WebGL validation"
I host this localhost website under IIS, and I run the tests with Firefox and chrome. There are different failures number wether I'm running the unit tests under Firefox or Chrome.
Is that to be expected ?
Are you interested in having the stack trace of those failures (and if so, is there an easy way to copy that trace) ?
That being said, Cesium works fine in both browsers under localhost, so I suppose it's only small failures.