title: Customized Plugin
body: <p>I want to make a plugin or extension or anything that could be attached to "Opera &amp; firefox" to search in the current open page for built in words and give error message if something missing</p>
  
  <p>e.g: "the browser will have a button, once clicked (it'll work like the normal CTRL+F but it'll have a built in words like apple &amp; banana it'll highlight apple and banana in the text page &amp; raise a flag or error message if apple not exist in the page )"</p>
  
  <p>i'll needs also to make validations and checks on the built in words and so on but basically i want to know if the basic function could be done</p>
  
  <p>just tell me how to start or what to read or which language to start learning </p>
  
  <p>*P.S: i've simple programming background , i only need to know where to start</p>