Added background script

src/background.ts

@@ -0,0 +1 @@
+console.log("background script on");

src/manifest.json

@@ -4,7 +4,8 @@
 	"version": "0.1",
 	"browser_action": {
 		"browser_style": true,
-		"default_popup": "popup.html"
+		"default_popup": "popup.html",
+		"background": { "scripts": ["background.bundle.js"] }
 	},
 	"permissions": ["activeTab"]
 }

webpack.config.js

@@ -11,6 +11,7 @@ let options = {
 	entry: {
 		popup: path.join(__dirname, "src", "popup", "popup.ts"),
 		content_script: path.join(__dirname, "src", "content_script.ts"),
+		background: path.join(__dirname, "src", "background.ts"),
 	},
 	output: {
 		path: path.resolve(__dirname, "dist"),