This fixes the issue discussed in comment 211 and 212 involving adding and removing the sandbox attribute and correctly enabling and disabling plugins. I tested adding and removing the attribute in various combinations and then navigating the sandbox document.
I did a try run earlier this week and there were problems with some of the tests timing out, I'm looking into that now.
Created attachment 639552
iframe sandbox v20
This fixes the issue discussed in comment 211 and 212 involving adding and removing the sandbox attribute and correctly enabling and disabling plugins. I tested adding and removing the attribute in various combinations and then navigating the sandbox document.
I did a try run earlier this week and there were problems with some of the tests timing out, I'm looking into that now.