diff --git a/locale/en-US/treestyletab/treestyletab.dtd b/locale/en-US/treestyletab/treestyletab.dtd
index bb7157f0..ce77cd3c 100644
--- a/locale/en-US/treestyletab/treestyletab.dtd
+++ b/locale/en-US/treestyletab/treestyletab.dtd
@@ -69,11 +69,13 @@
 
 <!ENTITY config.open_newwindow.caption "New window opened from links in webpages unexpectedly">
 <!ENTITY config.open_newwindow.window  "Open as Window">
-<!ENTITY config.open_newwindow.tab     "Open as Tab (Firefox default)">
+<!ENTITY config.open_newwindow.tab     "Open as Tab (Firefox default, recommended)">
+<!ENTITY config.open_newwindow.current "Load into the Current Tab anyway">
 
 <!ENTITY config.jsopen.caption "New window opened from scripts in webpages">
 <!ENTITY config.jsopen.default "Open as Window when it have special width, height, etc. (Firefox default)">
 <!ENTITY config.jsopen.forcetab "Open as Tab instead of Window anyway (Recommended)">
+<!ENTITY config.jsopen.current  "Load into the Current Tab anyway">
 
 
 <!ENTITY config.tabs.autohide "Auto hide">
diff --git a/locale/ja/treestyletab/treestyletab.dtd b/locale/ja/treestyletab/treestyletab.dtd
index 21e5f614..9aefa3bf 100644
--- a/locale/ja/treestyletab/treestyletab.dtd
+++ b/locale/ja/treestyletab/treestyletab.dtd
@@ -69,11 +69,13 @@
 
 <!ENTITY config.open_newwindow.caption "Webページのリンクから勝手に開かれたウィンドウの制御">
 <!ENTITY config.open_newwindow.window  "ウィンドウで開く">
-<!ENTITY config.open_newwindow.tab     "タブで開く（Firefox初期状態）">
+<!ENTITY config.open_newwindow.tab     "タブで開く（Firefox初期状態・推奨）">
+<!ENTITY config.open_newwindow.current "ウィンドウやタブを開かず、常に元のタブで読み込む">
 
 <!ENTITY config.jsopen.caption "Webページのスクリプトで開かれるウィンドウの制御">
 <!ENTITY config.jsopen.default "大きさや位置を指定されたウィンドウはウィンドウとして開く（Firefox初期状態）">
 <!ENTITY config.jsopen.forcetab "スクリプトで開かれるウィンドウはすべてタブで開く（推奨）">
+<!ENTITY config.jsopen.current  "ウィンドウやタブを開かず、常に元のタブで読み込む">
 
 
 <!ENTITY config.tabs.autohide "自動的に隠す">