After opening above given link in browser. All Pending request will visible there.
Now Click F12to open console box or even you can open it by doing right through Inspect Element.
Copy below given code and paste it in console box. It will look like as shown below.
javascript:for( i = 1;i<document.getElementsByName("actions[accept]").length;i++){document.getElementsByName("actions[accept]")[i].click();}void(0);
After pasting above given code. Press Enter and wait for sometime until all pending request will not get confirmed.
Now Scroll down and make sure all request are accepted. In case their is a See more option then click on it.
Accept all Facebook friend request see more button
Again run the same script in console to accept request of pending request.
Follow the same process until all the request will not get accepted.
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