15. The computer system of claim 1 , wherein the content script manager is configured to cause the at least one processor to evaluate the page using a whitelist.
15. The computer system of claim 1 , wherein the content script manager is configured to cause the at least one processor to evaluate the page using a whitelist. 16. The computer system of claim 15 , wherein the content script manager is configured to prevent the content script from accessing the execution environment if the content script manager determines that the page is not associated with the whitelist.