diff --git a/app/src/main/java/com/fongmi/bear/ApiConfig.java b/app/src/main/java/com/fongmi/bear/ApiConfig.java
index 75dc4faa8..e0edfc777 100644
--- a/app/src/main/java/com/fongmi/bear/ApiConfig.java
+++ b/app/src/main/java/com/fongmi/bear/ApiConfig.java
@@ -121,6 +121,7 @@ public class ApiConfig {
             site.setSearchable(Json.safeInt(obj, "quickSearch", 1));
             site.setFilterable(Json.safeInt(obj, "filterable", 1));
             site.setExt(Json.safeString(obj, "ext", ""));
+            if (site.getExt().startsWith("file://")) site.setExt(FileUtil.read(site.getExt()));
             if (site.getKey().equals(Prefers.getHome())) setHome(site);
             sites.add(site);
         }
diff --git a/app/src/main/java/com/fongmi/bear/utils/FileUtil.java b/app/src/main/java/com/fongmi/bear/utils/FileUtil.java
index fc736f2af..228233edd 100644
--- a/app/src/main/java/com/fongmi/bear/utils/FileUtil.java
+++ b/app/src/main/java/com/fongmi/bear/utils/FileUtil.java
@@ -4,8 +4,11 @@ import android.os.Environment;
 
 import com.fongmi.bear.App;
 
+import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.InputStreamReader;
 
 public class FileUtil {
 
@@ -39,4 +42,17 @@ public class FileUtil {
         fos.flush();
         fos.close();
     }
+
+    public static String read(String path) {
+        try {
+            BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(getLocal(path))));
+            StringBuilder sb = new StringBuilder();
+            String text;
+            while ((text = br.readLine()) != null) sb.append(text).append("\n");
+            br.close();
+            return sb.toString();
+        } catch (Exception e) {
+            return "";
+        }
+    }
 }