Use PNG icons in manifest and README

Author: jgsncsggjv-tech

opera-extension/README.md

@@ -17,7 +17,7 @@ How to load in Opera:
 
 Icon preview:
 
-![Icon preview](icons/icon128.svg)
+![Icon preview](icons/icon128.png)
 
 Notes:
 

opera-extension/manifest.json

@@ -10,12 +10,12 @@
   "action": {
     "default_popup": "popup.html",
     "default_icon": {
-      "48": "icons/icon48.svg",
-      "128": "icons/icon128.svg"
+      "48": "icons/icon48.png",
+      "128": "icons/icon128.png"
     }
   },
   "icons": {
-    "48": "icons/icon48.svg",
-    "128": "icons/icon128.svg"
+    "48": "icons/icon48.png",
+    "128": "icons/icon128.png"
   }
 }