I use facebook app on my iphone?

When i open safari and search for any page i liked on fb then automatically my fb accounts gets logged in… Though i don't use safari for facebook. I use fb app.

Just an automatic thing

Facebook support is integrated throughout the system. You are signed into Facebook from the app's settings which is available throughout the system.

You probably Had it Signed in At One Point on the mobile Site or Something you Can Just Log Off of it and Uncheck Remember info and That Should Stop it From Doing That you May Need to Login Tho To See The Full Page On Facebook