const fileField = document.querySelector('input[type="file"]'); fileField.addEventListener("change",() => { console.log(fileField.files[0]); browser.runtime.sendMessage({status:"FileChange",file: fileField.files[0]}); }); document.getElementById("id_run").addEventListener("click", function(e){ alert("Run script"); startBackgroundScript(); e.preventDefault(); }); function startBackgroundScript() { browser.runtime.sendMessage("Button_clicked"); console.log("home.js sent button_clicked message..."); }