title: chrome extension remove script tags
body: <p>i looked everywhere trying to find an answer to this question. 
  i want my extension to either disable all javascript on the page BUT to allow the insertion of a cotent script that will work. (so chrome.contentSettings.javascript is not a valid option for now)
  Alternatively i want a way to remove all script tags before any of them fire (which is kinda the same thing) </p>
  
  <p>i tried inserting content scripts to runat:document_start but the dom is not fully there at the time. itried adding a conte t s ript on tabs.onUpdate when state is loading but that is too late and as well as content scripts at document_end (all of which who try to remove script tags)  but it is still too late. 
  in an act of desperation i tried altering the behavior of the getters and setters of element.innerHTML to. remove the tags but that did not work as well</p>
  
  <p>i am trying to avoid sending an xhr request to location.href and parse and re_set the content as that is too intensive. </p>
  
  <p>any ideas? </p>