let your-varible = "test";

​

    //Get the tab ID of the target url

    chrome.tabs.query({url: "<Insert Target URL here>/*"}, function(tabs) {

    var tabId = tabs[0].id;

    console.log(tabId);

    chrome.scripting.executeScript({

      target: {tabId},

      //also dont forget to pass in the varible into the function

      func: function(your-varible) {

          console.log(your-varible);

        },

      args: [

          your-varible,

        //add more varibles here

      ]

    });

  });

​

​

//you will also need to add this to your manifest.json file

​

"permissions": [

    "tabs",

    "activeTab",

    "scripting"

  ],

  "host_permissions": [

    "<your-url>/*"

  ]