diff --git a/README.md b/README.md
index 172c05b..b2aacc3 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ Need install target OS's `gcc` library, here's an example of use `Mac` building
 ```shell
 brew install mingw-w64
 
-CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC="x86_64-w64-mingw32-gcc" go build
+CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc go build
 ```
 
 #### For Linux
diff --git a/README_ZH.md b/README_ZH.md
index 1863d44..8911082 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -99,7 +99,7 @@ $ CGO_ENABLED=1 go build
 ``` shell
 brew install mingw-w64
 
-CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC="x86_64-w64-mingw32-gcc" go build
+CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc go build
 ```
 
 #### Linux
diff --git a/cmd/hack-browser-data/main.go b/cmd/hack-browser-data/main.go
index 5ab77f3..23934d9 100644
--- a/cmd/hack-browser-data/main.go
+++ b/cmd/hack-browser-data/main.go
@@ -49,7 +49,6 @@ func Execute() {
 				browsers []browser.Browser
 				err      error
 			)
-			log.Debugf("browser: %s", browserName)
 			browsers, err = browser.PickBrowser(browserName, profilePath)
 			if err != nil {
 				log.Error(err)
diff --git a/internal/browingdata/browsingdata.go b/internal/browingdata/browsingdata.go
index adf8128..d46ae19 100644
--- a/internal/browingdata/browsingdata.go
+++ b/internal/browingdata/browsingdata.go
@@ -15,7 +15,7 @@ import (
 )
 
 type Data struct {
-	Sources map[item.Item]Source
+	sources map[item.Item]Source
 }
 
 type Source interface {
@@ -26,7 +26,7 @@ type Source interface {
 
 func New(sources []item.Item) *Data {
 	bd := &Data{
-		Sources: make(map[item.Item]Source),
+		sources: make(map[item.Item]Source),
 	}
 	bd.addSource(sources)
 	return bd
@@ -34,9 +34,9 @@ func New(sources []item.Item) *Data {
 
 func (d *Data) Recovery(masterKey []byte) error {
 
-	for _, source := range d.Sources {
+	for _, source := range d.sources {
 		if err := source.Parse(masterKey); err != nil {
-			log.Error(err)
+			log.Errorf("parse %s error %s", source.Name(), err.Error())
 		}
 	}
 	return nil
@@ -45,16 +45,16 @@ func (d *Data) Recovery(masterKey []byte) error {
 func (d *Data) Output(dir, browserName, flag string) {
 	output := NewOutPutter(flag)
 
-	for _, source := range d.Sources {
+	for _, source := range d.sources {
 
 		filename := fileutil.Filename(browserName, source.Name(), output.Ext())
 
 		f, err := output.CreateFile(dir, filename)
 		if err != nil {
-			log.Error(err)
+			log.Errorf("create file error %s", err)
 		}
 		if err := output.Write(source, f); err != nil {
-			log.Error(err)
+			log.Errorf("%s write to file %s error %s", source.Name(), filename, err.Error())
 		}
 		log.Noticef("output to file %s success", path.Join(dir, filename))
 	}
@@ -64,31 +64,31 @@ func (d *Data) addSource(Sources []item.Item) {
 	for _, source := range Sources {
 		switch source {
 		case item.ChromiumPassword:
-			d.Sources[source] = &password.ChromiumPassword{}
+			d.sources[source] = &password.ChromiumPassword{}
 		case item.ChromiumCookie:
-			d.Sources[source] = &cookie.ChromiumCookie{}
+			d.sources[source] = &cookie.ChromiumCookie{}
 		case item.ChromiumBookmark:
-			d.Sources[source] = &bookmark.ChromiumBookmark{}
+			d.sources[source] = &bookmark.ChromiumBookmark{}
 		case item.ChromiumHistory:
-			d.Sources[source] = &history.ChromiumHistory{}
+			d.sources[source] = &history.ChromiumHistory{}
 		case item.ChromiumDownload:
-			d.Sources[source] = &download.ChromiumDownload{}
+			d.sources[source] = &download.ChromiumDownload{}
 		case item.ChromiumCreditCard:
-			d.Sources[source] = &creditcard.ChromiumCreditCard{}
+			d.sources[source] = &creditcard.ChromiumCreditCard{}
 		case item.YandexPassword:
-			d.Sources[source] = &password.YandexPassword{}
+			d.sources[source] = &password.YandexPassword{}
 		case item.YandexCreditCard:
-			d.Sources[source] = &creditcard.YandexCreditCard{}
+			d.sources[source] = &creditcard.YandexCreditCard{}
 		case item.FirefoxPassword:
-			d.Sources[source] = &password.FirefoxPassword{}
+			d.sources[source] = &password.FirefoxPassword{}
 		case item.FirefoxCookie:
-			d.Sources[source] = &cookie.FirefoxCookie{}
+			d.sources[source] = &cookie.FirefoxCookie{}
 		case item.FirefoxBookmark:
-			d.Sources[source] = &bookmark.FirefoxBookmark{}
+			d.sources[source] = &bookmark.FirefoxBookmark{}
 		case item.FirefoxHistory:
-			d.Sources[source] = &history.FirefoxHistory{}
+			d.sources[source] = &history.FirefoxHistory{}
 		case item.FirefoxDownload:
-			d.Sources[source] = &download.FirefoxDownload{}
+			d.sources[source] = &download.FirefoxDownload{}
 		}
 	}
 }
diff --git a/internal/browser/browser.go b/internal/browser/browser.go
index badecd3..3d82c5a 100644
--- a/internal/browser/browser.go
+++ b/internal/browser/browser.go
@@ -46,12 +46,11 @@ func pickChromium(name, profile string) []Browser {
 				log.Noticef("find browser %s success", b.Name())
 				browsers = append(browsers, b)
 			} else {
-				// TODO: show which browser find failed
-				if strings.Contains(err.Error(), "profile folder is not exist") {
+				if err == chromium.ErrProfilePathNotFound {
 					log.Errorf("find browser %s failed, profile folder is not exist, maybe not installed", v.name)
 					continue
 				} else {
-					log.Errorf("new chromium error:", err)
+					log.Errorf("new chromium error: %s", err.Error())
 				}
 			}
 		}
@@ -62,10 +61,11 @@ func pickChromium(name, profile string) []Browser {
 		}
 		b, err := chromium.New(c.name, c.storage, profile, c.items)
 		if err != nil {
-			if strings.Contains(err.Error(), "profile folder is not exist") {
+			if err == chromium.ErrProfilePathNotFound {
 				log.Fatalf("find browser %s failed, profile folder is not exist, maybe not installed", c.name)
 			} else {
 				log.Fatalf("new chromium error:", err)
+				return nil
 			}
 		}
 		browsers = append(browsers, b)
@@ -89,13 +89,12 @@ func pickFirefox(name, profile string) []Browser {
 					browsers = append(browsers, b)
 				}
 			} else {
-				if strings.Contains(err.Error(), "profile folder is not exist") {
+				if err == firefox.ErrProfilePathNotFound {
 					log.Errorf("find browser firefox %s failed, profile folder is not exist", v.name)
 				} else {
 					log.Error(err)
 				}
 			}
-
 		}
 		return browsers
 	}
@@ -128,9 +127,5 @@ const (
 	coccocName     = "CocCoc"
 	yandexName     = "Yandex"
 
-	firefoxName        = "Firefox"
-	firefoxBetaName    = "Firefox Beta"
-	firefoxDevName     = "Firefox Dev"
-	firefoxNightlyName = "Firefox Nightly"
-	firefoxESRName     = "Firefox ESR"
+	firefoxName = "Firefox"
 )
diff --git a/internal/browser/chromium/chromium.go b/internal/browser/chromium/chromium.go
index 3ffe53c..1d278f8 100644
--- a/internal/browser/chromium/chromium.go
+++ b/internal/browser/chromium/chromium.go
@@ -1,7 +1,7 @@
 package chromium
 
 import (
-	"fmt"
+	"errors"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -22,6 +22,10 @@ type chromium struct {
 	itemPaths   map[item.Item]string
 }
 
+var (
+	ErrProfilePathNotFound = errors.New("profile path not found")
+)
+
 // New create instance of chromium browser, fill item's path if item is existed.
 func New(name, storage, profilePath string, items []item.Item) (*chromium, error) {
 	c := &chromium{
@@ -30,7 +34,7 @@ func New(name, storage, profilePath string, items []item.Item) (*chromium, error
 	}
 	// TODO: Handle file path is not exist
 	if !fileutil.FolderExists(profilePath) {
-		return nil, fmt.Errorf("%s profile folder is not exist: %s", name, profilePath)
+		return nil, ErrProfilePathNotFound
 	}
 	itemsPaths, err := c.getItemPath(profilePath, items)
 	if err != nil {
diff --git a/internal/browser/firefox/firefox.go b/internal/browser/firefox/firefox.go
index 4c15107..d0578ac 100644
--- a/internal/browser/firefox/firefox.go
+++ b/internal/browser/firefox/firefox.go
@@ -1,15 +1,14 @@
 package firefox
 
 import (
+	"errors"
 	"fmt"
 	"io/fs"
 	"io/ioutil"
 	"path/filepath"
-	"strings"
 
 	"hack-browser-data/internal/browingdata"
 	"hack-browser-data/internal/item"
-	"hack-browser-data/internal/log"
 	"hack-browser-data/internal/utils/fileutil"
 	"hack-browser-data/internal/utils/typeutil"
 )
@@ -23,10 +22,14 @@ type firefox struct {
 	itemPaths   map[item.Item]string
 }
 
+var (
+	ErrProfilePathNotFound = errors.New("profile path not found")
+)
+
 // New returns a new firefox instance.
 func New(name, storage, profilePath string, items []item.Item) ([]*firefox, error) {
 	if !fileutil.FolderExists(profilePath) {
-		return nil, fmt.Errorf("%s profile folder is not exist: %s", name, profilePath)
+		return nil, ErrProfilePathNotFound
 	}
 	f := &firefox{
 		name:        name,
@@ -36,10 +39,6 @@ func New(name, storage, profilePath string, items []item.Item) ([]*firefox, erro
 	}
 	multiItemPaths, err := f.getMultiItemPath(f.profilePath, f.items)
 	if err != nil {
-		if strings.Contains(err.Error(), "profile folder is not exist") {
-			log.Error(err)
-			return nil, nil
-		}
 		return nil, err
 	}
 	var firefoxList []*firefox