diff --git a/config.json b/config.json
index f142541..743e590 100644
--- a/config.json
+++ b/config.json
@@ -2,7 +2,7 @@
   "HOST": "127.0.0.1",
   "PORT": "3333",
   "QUALITY": "80",
-  "IMG_PATH": "/path/to/pics",
+  "IMG_PATH": "./pics",
   "EXHAUST_PATH": "",
-  "ALLOWED_TYPES": ["jpg","png","jpeg","bmp","gif"]
+  "ALLOWED_TYPES": ["jpg","png","jpeg","bmp"]
 }
\ No newline at end of file
diff --git a/go.mod b/go.mod
index c5844a6..40503a6 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,6 @@ go 1.13
 require (
 	github.com/chai2010/webp v1.1.0
 	github.com/gofiber/fiber v1.4.0
-	github.com/sirupsen/logrus v1.4.2
+	github.com/sirupsen/logrus v1.6.0
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1
 )
diff --git a/helper.go b/helper.go
index 6ede512..324bab8 100644
--- a/helper.go
+++ b/helper.go
@@ -2,11 +2,13 @@ package main
 
 import (
 	"fmt"
+	"github.com/gofiber/fiber"
 	log "github.com/sirupsen/logrus"
 	"net/http"
 	"os"
 	"path"
 	"path/filepath"
+	"strings"
 )
 
 func ChanErr(ccc chan int) {
@@ -59,3 +61,45 @@ func GenWebpAbs(RawImagePath string, ExhaustPath string, ImgFilename string, req
 	WebpAbsolutePath := path.Clean(path.Join(ExhaustPath, path.Dir(reqURI), WebpFilename))
 	return cwd, WebpAbsolutePath
 }
+
+func CheckUA(c *fiber.Ctx, RawImageAbs string) (string, bool) {
+	// reference: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
+	// https://developer.chrome.com/multidevice/user-agent#chrome_for_ios_user_agent
+	// Chrome
+	// ✅ Windows: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
+	// ✅ macOS:   Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
+	// ✅ Linux:   Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
+	// ✅ iOS:     Mozilla/5.0 (iPhone; CPU iPhone OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/83.0.4103.63 Mobile/15E148 Safari/604.1
+	// ✅ Android: Mozilla/5.0 (Linux; Android 10) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.60 Mobile Safari/537.36
+
+	// Firefox
+	// ✅ Windows: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0
+	// ✅ macOS:   Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0
+	// ✅ Linux:   Mozilla/5.0 (X11; Linux i686; rv:76.0) Gecko/20100101 Firefox/76.0
+	// ✅ iOS:     Mozilla/5.0 (iPad; CPU OS 10_15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/25.0 Mobile/15E148 Safari/605.1.15
+	// ✅ Android: Mozilla/5.0 (Android 10; Mobile; rv:68.0) Gecko/68.0 Firefox/68.0
+
+	// Safari
+	// ❎ macOS: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15
+	// ❎ iOS:   Mozilla/5.0 (iPad; CPU OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Mobile/15E148 Safari/604.1
+
+	// WeChat
+	// ❎ iOS:     Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_3 like Mac OS X) AppleWebKit/603.3.8 (KHTML, like Gecko) Mobile/14G60 wxwork/2.1.5 MicroMessenger/6.3.22
+	// ✅ Windows: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36 MicroMessenger/6.5.2.501 NetType/WIFI WindowsWechat QBCore/3.43.691.400 QQBrowser/9.0.2524.400
+	// ✅ Android: Mozilla/5.0 (Linux; Android 7.0; LG-H831 Build/NRD90U; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 MicroMessenger/6.6.7.1303(0x26060743) NetType/WIFI Language/zh_TW
+
+	UA := c.Get("User-Agent")
+
+	if strings.Contains(UA, "Firefox") || strings.Contains(UA, "Chrome") {
+		// Chrome or firefox on macOS Windows
+	} else if strings.Contains(UA, "Android") || strings.Contains(UA, "Windows") || strings.Contains(UA, "Linux") {
+		// on Android, Windows and Linux
+	} else if strings.Contains(UA, "FxiOS") || strings.Contains(UA, "CriOS") {
+		//firefox and Chrome on iOS
+	} else {
+		log.Infof("A Safari user has arrived...%s", UA)
+		c.SendFile(RawImageAbs)
+		return "", true
+	}
+	return UA, false
+}
diff --git a/router.go b/router.go
index 7c7b60a..a99f1b1 100644
--- a/router.go
+++ b/router.go
@@ -19,11 +19,9 @@ func Convert(ImgPath string, ExhaustPath string, AllowedTypes []string, QUALITY
 		var RawImageAbs = path.Join(ImgPath, reqURI) // /home/xxx/mypic/123.jpg
 		var ImgFilename = path.Base(reqURI)          // pure filename, 123.jpg
 		var finalFile string                         // We'll only need one c.sendFile()
-		// Check for Safari users. If they're Safari or the UA contains `AppleWebKit`(Might be the WeChat Browser), just simply ignore everything.
-		UA := c.Get("User-Agent")
-		if (strings.Contains(UA, "Safari") && !strings.Contains(UA, "Chrome") && !strings.Contains(UA, "Firefox")) || (strings.Contains(UA, "AppleWebKit")) {
-			log.Info("A Safari user has arrived...")
-			c.SendFile(RawImageAbs)
+
+		UA, done := CheckUA(c, RawImageAbs)
+		if done {
 			return
 		}
 		log.Debugf("Incoming connection from %s@%s with %s", UA, c.IP(), ImgFilename)