Steps to know profile visitors in Facebook .
Step 1) open your facebook account.Note : don't confuse that these are chat session I'd , but they are profile I'd s of your friends who visited your profile recently .
Step 2) go to "Home" .
Step 3) Right click anywhere on your Facebook screen and select page source .
Step 4) now press ctrl + f to open find tool.
Now search for " initialchatfriendlist "
Step 5) after step 4 , you will get profile id numbers . Copy the profile id no which will of 15 digits and looks like this - 110012013526261 i.e 15 digit codes.
Step 6) these codes are your friends profile id 's tagcodes .
Step 7) now just open new tab enter url like www.facebook.com/"your friends tag code " and hit enter.
Step 8) now see the profile of your friend who visited your profile recently .
Step 9) to check all profile visitors repeat above steps again and again .
This trick is working perfectly and check your Facebook profile viewers easily without any Facebook app . If someone find it difficult please comment your query below.