diff --git a/tools/chromium_extension/README.md b/tools/chromium_extension/README.md
index 0acdc80..08f4568 100644
--- a/tools/chromium_extension/README.md
+++ b/tools/chromium_extension/README.md
@@ -8,4 +8,3 @@
 > 4. 选择 Load unpacked extension... 然后定位到刚才解压的文件夹里面的 `tools/chromium_extension` 目录，确定
 > 5. 这就安装好了，去掉 Developer Mode 勾选。
 > 6. 打开[`https://github.com/shimohq/chinese-programmer-wrong-pronunciation.git`](https://github.com/shimohq/chinese-programmer-wrong-pronunciation.git)点击单词，即可听正确的单词读音
-
diff --git a/tools/chromium_extension/css/app.css b/tools/chromium_extension/css/app.css
index 12ba523..aefbda5 100644
--- a/tools/chromium_extension/css/app.css
+++ b/tools/chromium_extension/css/app.css
@@ -9,5 +9,4 @@ tr:hover {
   font-weight: 200;
   font-size: 1.1rem;
   */
-
 }