1. A method performed by a computing device, comprising: placing an accent in a browser frame, during generation of at least one script that runs in the browser frame, by applying an XOR operation to combine an accent key with source code of the at least one script, the accent key being uniquely associated with a domain of the at least one script, wherein the accent key is a hash of a domain name of the domain; allowing communication between the browser frame and another browser frame with an identical accent to the accent, while preventing communication between the browser frame and other browser frames that do not have the identical accent; and removing the accent from the browser frame prior to compiling the source code.