feat: support extension for firefox

internal/item/filename.go

@@ -20,6 +20,7 @@ const (
 	fileFirefoxPassword     = "logins.json"
 	fileFirefoxData         = "places.sqlite"
 	fileFirefoxLocalStorage = "webappsstore.sqlite"
+	fileFirefoxExtension    = "extensions.json"
 )
 
 const (
@@ -49,5 +50,5 @@ const (
 	TempFirefoxDownload     = "firefoxDownload"
 	TempFirefoxLocalStorage = "firefoxLocalStorage"
 	TempFirefoxCreditCard   = ""
-	TempFirefoxExtension    = ""
+	TempFirefoxExtension    = "firefoxExtension"
 )

internal/item/item.go

@@ -63,11 +63,11 @@ func (i Item) FileName() string {
 		return fileFirefoxData
 	case FirefoxLocalStorage:
 		return fileFirefoxLocalStorage
-	case FirefoxCreditCard:
-		return UnsupportedItem
 	case FirefoxHistory:
 		return fileFirefoxData
 	case FirefoxExtension:
+		return fileFirefoxExtension
+	case FirefoxCreditCard:
 		return UnsupportedItem
 	default:
 		return UnknownItem
@@ -115,7 +115,7 @@ func (i Item) String() string {
 	case FirefoxCreditCard:
 		return UnsupportedItem
 	case FirefoxExtension:
-		return UnsupportedItem
+		return TempFirefoxExtension
 	default:
 		return UnknownItem
 	}