steps :
1 : download ad-block plus
here is the link for downloading ad-block extension its available in all major browsers and steps are pretty same for all browser
Download
when you open Facebook.com you see creepy advertisements like this
let them block
2 : decide what you want to block
3 : lets block them
right click and from ad-block menu choose block ad on this page
Then choose part from page which you want to block and click on it
it will show you info about what it blocking so in future you can remove from extensions options
what it does when you click on block it option its caret a filter so next time when you load the page its don’t load that content again
you can undo this change by simple tools>extension>ad-block>option
and remove that filter
4 : leav a comment about your experience
thanks
enjoy ad free browsing