Updating manifest to version 3

src/manifest.json

@@ -1,9 +1,8 @@
 {
-  "manifest_version": 2,
+  "manifest_version": 3,
   "name": "MetamorPOV",
   "author": "Jean Viscogliosi-Pate",
   "version": "1.1.0",
-  "license": "GPL-3.0-or-later",
 
   "description": "Enables customization of reader-insert stories by replacing author-provided hooks such as Y/n, pov/s, and vrb/do/present/.",
 
@@ -15,7 +14,7 @@
     "gecko_android": {}
   },
 
-  "browser_action": {
+  "action": {
     "default_title": "MetamorPOV",
     "default_icon": {
       "16":  "metamorpov.svg",
@@ -33,6 +32,11 @@
     "tabs"
   ],
 
+  "host_permissions": [
+    "http://*/*",
+    "https://*/*"
+  ],
+
   "icons": {
     "16":  "metamorpov.svg",
     "32":  "metamorpov.svg",