Properly get the quality/type of base64 images.

Author: vrabaud

background.js

@@ -166,12 +166,15 @@ function TestUrl(url, port) {
     if (url.includes("image/webp")) {
       // Base64 like on Amazon.
       console.log("WebP in base 64.");
-      // TODO analyze the blob properly.
+      var i = url.search("base64") + 6;
+      while(url[i] == "," || url[i] == " ")++i;
+      var blob = Uint8Array.from(atob(url.substring(i)), c => c.charCodeAt(0));
+      var quality = VP8EstimateQuality(blob);
       port.postMessage({
         "request": "webp_test_url",
         "url": url,
-        "quality": 0,
-        "type": "VP8 "
+        "quality": quality["quality"],
+        "type": quality["type"]
       });
     }
   } else {

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "WebP Highlighter",
-  "version": "1.19",
+  "version": "1.20",
   "description": "Makes WebP's recognizable on a webpage.",
   "icons": {"48": "icons/webplogo.png"},
   "permissions": ["webRequest", "webRequestBlocking", "storage", "tabs",