diff --git a/Casks/firefoxdeveloperedition-cn.rb b/Casks/firefoxdeveloperedition-cn.rb
deleted file mode 100644
index d8151431d..000000000
--- a/Casks/firefoxdeveloperedition-cn.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-cask 'firefoxdeveloperedition-cn' do
-  version :latest
-  sha256 :no_check
-
-  url 'https://download.mozilla.org/?product=firefox-aurora-latest-l10n&os=osx&lang=zh-CN'
-  name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/zh-CN/firefox/developer/'
-  license :mpl
-
-  app 'FirefoxDeveloperEdition.app'
-end
diff --git a/Casks/firefoxdeveloperedition-ja.rb b/Casks/firefoxdeveloperedition-ja.rb
deleted file mode 100644
index d3d4707e9..000000000
--- a/Casks/firefoxdeveloperedition-ja.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-cask 'firefoxdeveloperedition-ja' do
-  version :latest
-  sha256 :no_check
-
-  url 'https://download.mozilla.org/?product=firefox-aurora-latest-l10n&os=osx&lang=ja-JP-mac'
-  name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/ja/firefox/developer/'
-  license :mpl
-
-  app 'FirefoxDeveloperEdition.app'
-end
diff --git a/Casks/firefoxdeveloperedition-ru.rb b/Casks/firefoxdeveloperedition-ru.rb
deleted file mode 100644
index 8747c369a..000000000
--- a/Casks/firefoxdeveloperedition-ru.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-cask 'firefoxdeveloperedition-ru' do
-  version :latest
-  sha256 :no_check
-
-  url 'https://download.mozilla.org/?product=firefox-aurora-latest-l10n&os=osx&lang=ru'
-  name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/ru/firefox/developer/'
-  license :mpl
-
-  app 'FirefoxDeveloperEdition.app'
-end
diff --git a/Casks/firefoxdeveloperedition-uk.rb b/Casks/firefoxdeveloperedition-uk.rb
deleted file mode 100644
index 867ac1f4f..000000000
--- a/Casks/firefoxdeveloperedition-uk.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-cask 'firefoxdeveloperedition-uk' do
-  version :latest
-  sha256 :no_check
-
-  url 'https://download.mozilla.org/?product=firefox-aurora-latest-l10n&os=osx&lang=uk'
-  name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/uk/firefox/developer/'
-  license :mpl
-
-  app 'FirefoxDeveloperEdition.app'
-end
diff --git a/Casks/firefoxdeveloperedition.rb b/Casks/firefoxdeveloperedition.rb
index cae37e845..c530281c8 100644
--- a/Casks/firefoxdeveloperedition.rb
+++ b/Casks/firefoxdeveloperedition.rb
@@ -2,9 +2,29 @@ cask 'firefoxdeveloperedition' do
   version :latest
   sha256 :no_check
 
-  url 'https://download.mozilla.org/?product=firefox-aurora-latest-ssl&os=osx&lang=en-US'
+  language 'en', default: true do
+    'en-US'
+  end
+
+  language 'ja' do
+    'ja-JP-mac'
+  end
+
+  language 'ru' do
+    'ru'
+  end
+
+  language 'uk' do
+    'uk'
+  end
+
+  language 'zh' do
+    'zh-CN'
+  end
+
+  url "https://download.mozilla.org/?product=firefox-aurora-latest#{language == 'en-US' ? 'ssl' : '-l10n'}&os=osx&lang=#{language}"
   name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/en-US/firefox/developer/'
+  homepage 'https://www.mozilla.org/firefox/developer/'
   license :mpl
 
   app 'FirefoxDeveloperEdition.app'