How to:
Create a bookmarklet into you bookmarks toolbar with the following code as url:
javascript:(function(){var script=document.createElement('script');script.setAttribute('type','text/javascript');script.setAttribute('src','https://raw.github.com/jangxyz/vanish.js/master/vanish.js');if(typeof script!='undefined'){document.getElementsByTagName('head')[0].appendChild(script);}})();"
- On any page, click the bookmarklet to activate
- Elements will be highlighted when hovered upon.
- Click the element you want to focus on. Any other elements will disappear.
- By clicking the element again, everyone will reappear.
- To deactivate, run the bookmarklet once more.