diff --git a/README.md b/README.md
index 7a14af6..498cf59 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # Gitako
 
+<p align="center">
+  <img width="256" src="src/assets/icons/Gitako.png" />
+</p>
+
 Yet another extension for GitHub, available on both Chrome and Firefox. Inspired by [Octotree](https://github.com/buunguyen/octotree) & [GayHub](https://github.com/jawil/GayHub), thanks to them! Gitako is aimed at providing the best performance, better UX, more consistent UI and more essential features.
 
 ### Features
@@ -29,9 +33,11 @@ Any bug report or feature request discussions are welcomed, feel free to draft a
 
 ### About
 
-#### Why named 'Gitako'?
+#### Name and logo meaning?
 
 GitHub's totem is a cute octopus. And octopus in Japanese is `タコ`(tako).
 Then link them together:
 
     git + tako -> gitako
+
+The logo of Gitako is a tentacle of octopus, meaning Gitako works like a part of GitHub.
diff --git a/src/assets/icons/Gitako-128.png b/src/assets/icons/Gitako-128.png
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diff --git a/src/assets/icons/Gitako-64.png b/src/assets/icons/Gitako-64.png
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diff --git a/src/assets/icons/Gitako.png b/src/assets/icons/Gitako.png
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diff --git a/src/manifest.json b/src/manifest.json
index 4f01c8e..67080ef 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -5,28 +5,17 @@
   "description": "The missing part of GitHub.",
   "author": "EnixCoda",
   "icons": {
-    "128": "icons/Gitako-128x128.png"
+    "128": "icons/Gitako-128.png",
+    "256": "icons/Gitako-256.png",
+    "512": "icons/Gitako-512.png"
   },
   "homepage_url": "https://github.com/EnixCoda/Gitako",
-  "permissions": [
-    "storage",
-    "*://*.github.com/*",
-    "*://*.sentry.io/*"
-  ],
-  "web_accessible_resources": [
-    "icons/vscode/*",
-    "content.css"
-  ],
+  "permissions": ["storage", "*://*.github.com/*", "*://*.sentry.io/*"],
+  "web_accessible_resources": ["icons/vscode/*", "content.css"],
   "content_scripts": [
     {
-      "matches": [
-        "https://github.com/*"
-      ],
-      "js": [
-        "firefox-shim.js",
-        "browser-polyfill.js",
-        "content.js"
-      ]
+      "matches": ["https://github.com/*"],
+      "js": ["firefox-shim.js", "browser-polyfill.js", "content.js"]
     }
   ]
-}
\ No newline at end of file
+}