--- a/toolkit/chrome/global/headsUpDisplay.properties
+++ b/toolkit/chrome/global/headsUpDisplay.properties
@@ -82,37 +82,16 @@ copyCmd.label		= コピー
 copyCmd.accesskey	= C
 selectAllCmd.label	= すべて選択
 selectAllCmd.accesskey	= A
 # LOCALIZATION NOTE (timestampFormat): %1$02S = hours (24-hour clock),
 # %2$02S = minutes, %3$02S = seconds, %4$03S = milliseconds.
 timestampFormat		= %1$02S:%2$02S:%3$02S.%4$03S
 
 helperFuncUnsupportedTypeError	= この種類のオブジェクト上の pprint は呼び出せません。
-# LOCALIZATION NOTE (networkUrlWithStatus):
-#
-# When the HTTP request is started only the URL of the request is printed to the
-# WebConsole. As the response status of the HTTP request arrives, the URL string
-# is replaced by this string (the response status can look like `HTTP/1.1 200 OK`).
-# The bracket is not closed to mark that this request is not done by now. As the
-# request is finished (the HTTP connection is closed) this string is replaced
-# by `networkUrlWithStatusAndDuration` which has a closing the braket.
-#
-# %1$S = URL of network request
-# %2$S = response status code from the server (e.g. `HTTP/1.1 200 OK`)
-networkUrlWithStatus	= %1$S [%2$S
-# LOCALIZATION NOTE (networkUrlWithStatusAndDuration):
-#
-# When the HTTP request is finished (the HTTP connection is closed) this string
-# replaces the former `networkUrlWithStatus` string in the WebConsole.
-#
-# %1$S = URL of network request
-# %2$S = response status code from the server (e.g. `HTTP/1.1 200 OK`)
-# %3$S = duration for the complete network request in milliseconds
-networkUrlWithStatusAndDuration	= %1$S [%2$S %3$Sms]
 NetworkPanel.label	= ネットワーク要求調査
 # LOCALIZATION NOTE (NetworkPanel.deltaDurationMS):
 #
 # This string is used to show the duration between two network events (e.g
 # request and respones header or response header and response body).
 NetworkPanel.durationMS	= %Sms
 # LOCALIZATION NOTE (NetworkPanel.imageSizeDeltaDurationMS):
 # This string is used to show the duration between the response header and the