Last I checked Chrome at least makes attempts to block this, but Safari will happily play along. I was using this functionality to create a frustratingly convo

Last I checked Chrome at least makes attempts to block this, but Safari will happily play along. I was using this functionality to create a frustratingly convoluted automated Steam key redeemer for Mac (https://github.com/Benjamin-Dobell/humble-bundle-key-redeemer https://github.com/Benjamin-Dobell/humble-bundle-key-redeeme...) but I had to drop Chrome support. Thankfully Valve have added a web API to activate keys, so I've since released a much less stupid Chrome extension. However, if you're interested in a practical example running JavaScript using AppleScript-style (it's actually Ruby) behaviour then check it out.