Replacement Notice Drosera has been replaced by an improved debugger built into the Web Inspector. The information this page still applies to Safari 3.1 and 3.0. If you need to debug javascript in those versions of Safari, you can obtain Drosera from nightly build r33431 on OS X and r33029 on Windows. About Drosera Drosera is a JavaScript debugger for WebKit that can be used with any application