works until loading page

background.js

@@ -29,26 +29,25 @@ function failure(value)
 		console.log("tabs.create returned a failure");
 }
 
-async function run(data,tab)
+function run(data,tab)
 {		
 		let i2=0;
 	//	injectScript(tab);
-		await		 browser.scripting.executeScript({
-						target:{
-								tabId: tab.id
-						},
-						files:["spawn.js"]
+		let promise =  browser.tabs.executeScript(tab.id,{				
+						file:"spawn.js"
 				});
-		console.log("bbackground.js: received start signal...");
-		if(i2 == 0)
-		{
-				browser.runtime.sendMessage({state: "Init",url: data.subscriptions[0].url});
-		}
-		else
-		{
-				browser.runtime.sendMessage({state: i2,url: data.subscriptions[i2].url});
-		}
-		i2++;
+		promise.then(function() {
+				console.log("bbackground.js: received start signal...");
+				if(i2 == 0)
+				{
+						browser.tabs.sendMessage(tab.id,{state: "Init",url: data.subscriptions[0].url});
+				}
+				else
+				{
+						browser.tabs.sendMessage(tab.id,{state: i2,url: data.subscriptions[i2].url});
+				}
+				i2++;
+		});
 }
 
 function readUrl()