diff --git a/icons/icons8-samovar-32.png b/icons/samovar-32.png
similarity index 100%
rename from icons/icons8-samovar-32.png
rename to icons/samovar-32.png
diff --git a/icons/icons8-samovar-48.png b/icons/samovar-48.png
similarity index 100%
rename from icons/icons8-samovar-48.png
rename to icons/samovar-48.png
diff --git a/icons/icons8-samovar-96.png b/icons/samovar-96.png
similarity index 100%
rename from icons/icons8-samovar-96.png
rename to icons/samovar-96.png
diff --git a/manifest.json b/manifest.json
index 4b0335c..5d040fa 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,33 +1,38 @@
 {
-  "manifest_version": 2,
+  "manifest_version": 3,
   "name": "samoware-multisave",
   "version": "1.0",
 
   "description": "When using the groupware CommuniGate with the web application Samoware, this browser extension saves all attachments from the currently opened email to a directory of the user's choosing, prefixing each entry's filename with the current date. Yep, it's quite specific.",
   
   "icons": {
-    "48": "icons/icons8-samovar-48.png",
-    "96": "icons/icons8-samovar-96.png"
+    "48": "icons/samovar-48.png",
+    "96": "icons/samovar-96.png"
   },
 
   "permissions": [
     "activeTab",
-    "tabs",
+    "scripting",
     "downloads"
   ],
 
+  "host_permissions": [
+    "*://localhost/*",
+    "https://communigate.aip.de/"
+  ],
+
   "page_action": {
-    "default_icon": "icons/icons8-samovar-32.png",
+    "default_icon": "icons/samovar-32.png",
     "default_title": "Samoware MultiSave",
     "show_matches": [
-      "https://communigate.aip.de/*"
+      "https://communigate.aip.de/*",
+      "*://localhost/*"
     ]
   },
 
   "background": {
     "scripts": [
       "background.js"
-    ],
-    "persistent": false
+    ]
   }
 }
\ No newline at end of file