upgrade to v3

main.js

@@ -1,3 +1,6 @@
-chrome.browserAction.onClicked.addListener(function(tab) {
-  chrome.tabs.executeScript({file: "fullscreen.js"});
+chrome.action.onClicked.addListener(function(tab) {
+  chrome.scripting.executeScript({
+      target: {tabId: tab.id},
+      files: ["fullscreen.js"]
+  });
 });

manifest.json

@@ -1,13 +1,14 @@
 {
-    "manifest_version": 2,
+    "manifest_version": 3,
     "name": "Fullscreen",
-    "version": "0.0.2",
+    "version": "0.0.3",
     "description": "Fullscreen extension for device without keyboard",
-    "permissions": ["activeTab"],
-    "browser_action":{},
+    "permissions": ["activeTab", "scripting"],
+    "action": {
+        "default_title": "Click to fullscreen"
+    },
     "background":
     {
-        "scripts": ["main.js"],
-        "persistent": false
+        "service_worker": "main.js"
     }
 }