diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index d775b2ee4..a02240357 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -392,6 +392,7 @@
 -keep class io.legado.app.lib.cronet.CronetInterceptor{*;}
 -keep class io.legado.app.lib.cronet.CronetLoader{*;}
 -keep class io.legado.app.help.AppUpdateGitHub{*;}
+-keep class io.legado.app.help.AppIntentType{*;}
 # Error Exception 
 -keep class * extends java.lang.Exception
 -keep class * extends java.lang.Error
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 7c8235082..1436fb3b0 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -381,12 +381,20 @@
                 <data android:mimeType="*/*" />
                 <!--TXT-->
                 <data android:pathAdvancedPattern=".*\\.[tT][xX][tT]" />
+                <data android:pathPattern=".*\\.txt" />
+                <data android:pathPattern=".*\\.TXT" />
                 <!--JSON-->
                 <data android:pathAdvancedPattern=".*\\.[jJ][sS][oO][nN]" />
+                <data android:pathPattern=".*\\.json" />
+                <data android:pathPattern=".*\\.JSON" />
                 <!-- EPUB -->
                 <data android:pathAdvancedPattern=".*\\.[eE][pP][uU][bB]" />
+                <data android:pathPattern=".*\\.epub" />
+                <data android:pathPattern=".*\\.EPUB" />
                 <!-- pdf -->
                 <data android:pathAdvancedPattern=".*\\.[pP][dD][fF]" />
+                <data android:pathPattern=".*\\.pdf" />
+                <data android:pathPattern=".*\\.PDF" />
             </intent-filter>
         </activity>
 
diff --git a/app/src/main/java/io/legado/app/help/CrashHandler.kt b/app/src/main/java/io/legado/app/help/CrashHandler.kt
index b72d9c944..684bac9d4 100644
--- a/app/src/main/java/io/legado/app/help/CrashHandler.kt
+++ b/app/src/main/java/io/legado/app/help/CrashHandler.kt
@@ -3,6 +3,7 @@ package io.legado.app.help
 import android.annotation.SuppressLint
 import android.content.Context
 import android.os.Build
+import android.webkit.WebSettings
 import io.legado.app.constant.AppConst
 import io.legado.app.model.ReadAloud
 import io.legado.app.utils.FileUtils
@@ -65,6 +66,7 @@ class CrashHandler(val context: Context) : Thread.UncaughtExceptionHandler {
                 map["MODEL"] = Build.MODEL
                 map["SDK_INT"] = Build.VERSION.SDK_INT.toString()
                 map["RELEASE"] = Build.VERSION.RELEASE
+                map["WebViewUserAgent"] = WebSettings.getDefaultUserAgent(appCtx)
                 //获取app版本信息
                 AppConst.appInfo.let {
                     map["versionName"] = it.versionName