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Its a handy tool for saving page clicks but I have found that it eats up a lot of cpu resources when several tabs are open. I have decided to keep it disabled unless I am going to do some significant searching.

Это отзыв для предыдущей версии этого дополнения (0.4.0.4). 

I just create a performance tuning tip, may help for your case http://www.teesoft.info/content/view/74/35/lang,en/