Untitled

onclick="$jq( '#search-results' ).msg( 'remove', this )"

{
  "manifest_version": 2,
  "name": "Hello World!",
  "version": "1.0",
  "description": "My first Chrome extension.",
  "permissions": ["tabs", "<all_urls>"],

  "browser_action": {
    "default_icon": "icon.png",
    "default_popup":"popup.html"
  }
 }

<!doctype html>
<html>
    <head><title>activity</title></head>
<body>
    <button id="clickactivity">click</button>
    <script src="mscript.js"></script>
</body>
</html>

function injectTheScript() {
    chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
        // query the active tab, which will be only one tab
        //and inject the script in it
        chrome.tabs.executeScript(tabs[0].id, {file: "content_script.js"});
    });
}

document.getElementById('clickactivity').addEventListener('click', injectTheScript);

var links = document.getElementsByClassName("card-remove icon");

    for (var i=0; i<links.length; i++) {

        killMatch(links[i]);

        sleep(500);

    }

    function killMatch(link) {
        link.click();
    }


    function sleep(milliseconds) {
      var start = new Date().getTime();
      for (var i = 0; i < 1e7; i++) {
        if ((new Date().getTime() - start) > milliseconds){
          break;
        }
      }
    }