How did Selenium RC trick browsers to overcome Same origin policy?

I have explained how Selenium RC trick browsers to overcome Same origin policy ,also called Single Origin Policy and have covered the following questions:

1. What is Same origin policy (SOP)?
2. What is HTTP Proxy?
3. What is Selenium RC?
4. How did Selenium RC trick browsers?

Let me know your query if any. Thanks , I hope you enjoy the video.
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Видео How did Selenium RC trick browsers to overcome Same origin policy? канала Chandan Gupta