diff --git a/browser/devtools/webide/locales/en-US/webide.dtd b/browser/devtools/webide/locales/en-US/webide.dtd
index d8af540f4d2e..7691744712f3 100644
--- a/browser/devtools/webide/locales/en-US/webide.dtd
+++ b/browser/devtools/webide/locales/en-US/webide.dtd
@@ -14,7 +14,7 @@
 <!ENTITY projectMenu_importHostedApp_accesskey "H">
 <!ENTITY projectMenu_selectApp_label "Open App…">
 <!ENTITY projectMenu_selectApp_accessley "S">
-<!ENTITY projectMenu_play_label "Install and run">
+<!ENTITY projectMenu_play_label "Install and Run">
 <!ENTITY projectMenu_play_accesskey "I">
 <!ENTITY projectMenu_stop_label "Stop App">
 <!ENTITY projectMenu_stop_accesskey "S">
@@ -42,7 +42,7 @@
 <!ENTITY viewMenu_accesskey "V">
 <!ENTITY viewMenu_toggleEditor_label "Toggle Editor">
 <!ENTITY viewMenu_toggleEditor_accesskey "E">
-<!ENTITY viewMenu_showAddons_label "Manage simulators">
+<!ENTITY viewMenu_showAddons_label "Manage Simulators">
 <!ENTITY viewMenu_showAddons_accesskey "M">
 
 <!ENTITY projectButton_label "Open App">
@@ -88,18 +88,18 @@
 
 <!-- Decks -->
 
-<!ENTITY deck_close "close">
+<!ENTITY deck_close "Close">
 
 <!-- Addons -->
-<!ENTITY addons_title "Extra Components:">
-<!ENTITY addons_aboutaddons "Open Addons Manager">
+<!ENTITY addons_title "Extra Components">
+<!ENTITY addons_aboutaddons "Open Add-ons Manager">
 
 <!-- Prefs -->
 <!ENTITY prefs_title "Preferences">
 <!ENTITY prefs_editor_title "Editor">
 <!ENTITY prefs_general_title "General">
-<!ENTITY prefs_restore "Restore defaults">
-<!ENTITY prefs_simulators "Manage simulators">
+<!ENTITY prefs_restore "Restore Defaults">
+<!ENTITY prefs_simulators "Manage Simulators">
 <!ENTITY prefs_options_enablelocalruntime "Enable local runtime">
 <!ENTITY prefs_options_enablelocalruntime_tooltip "Allow WebIDE to connect to its own runtime (running browser instance)">
 <!ENTITY prefs_options_rememberlastproject "Remember last project">
diff --git a/browser/devtools/webide/locales/en-US/webide.properties b/browser/devtools/webide/locales/en-US/webide.properties
index ee5baa2e325c..dd79c2b3f1df 100644
--- a/browser/devtools/webide/locales/en-US/webide.properties
+++ b/browser/devtools/webide/locales/en-US/webide.properties
@@ -13,7 +13,7 @@ remote_runtime=Remote Runtime
 remote_runtime_promptTitle=Remote Runtime
 remote_runtime_promptMessage=hostname:port
 
-importPackagedApp_title=Select directory
+importPackagedApp_title=Select Directory
 importHostedApp_title=Open Hosted App
 importHostedApp_header=Enter Manifest URL
 
@@ -26,14 +26,14 @@ error_listRunningApps=Can't get app list from device
 error_cantConnectToApp=Can't connect to app: %1$S
 error_cantInstallNotFullyConnected=Can't install project. Not fully connected.
 error_cantInstallValidationErrors=Can't install project. Validation errors.
-error_cantFetchAddonsJSON=Can't fetch the addon list: %S
+error_cantFetchAddonsJSON=Can't fetch the add-on list: %S
 
 addons_stable=stable
 addons_unstable=unstable
 addons_simulator_label=Firefox OS %1$S Simulator (%2$S)
 addons_install_button=install
 addons_uninstall_button=uninstall
-addons_adb_label=ADB Addon Helper
+addons_adb_label=ADB Helper Add-on
 addons_adb_warning=USB devices won't be detected without this add-on
 addons_status_unknown=?
 addons_status_installed=Installed