diff --git a/omega-target-chromium-extension/src/coffee/background_preload.coffee b/omega-target-chromium-extension/src/coffee/background_preload.coffee
index e2de513..ced9727 100644
--- a/omega-target-chromium-extension/src/coffee/background_preload.coffee
+++ b/omega-target-chromium-extension/src/coffee/background_preload.coffee
@@ -3,28 +3,30 @@ localStorage['log'] = ''
 localStorage['logLastError'] = ''
 
 window.OmegaContextMenuQuickSwitchHandler = -> null
-# We don't need this API. However its presence indicates that Chrome >= 35
-# which provides info.checked we need in contextMenu callback.
-# https://developer.chrome.com/extensions/contextMenus
-if chrome.i18n.getUILanguage?
-  # We must create the menu item here before others to make it first in menu.
+
+if chrome.contextMenus?
+  # We don't need this API. However its presence indicates that Chrome >= 35
+  # which provides info.checked we need in contextMenu callback.
+  # https://developer.chrome.com/extensions/contextMenus
+  if chrome.i18n.getUILanguage?
+    # We must create the menu item here before others to make it first in menu.
+    chrome.contextMenus.create({
+      id: 'enableQuickSwitch'
+      title: chrome.i18n.getMessage('contextMenu_enableQuickSwitch')
+      type: 'checkbox'
+      checked: false
+      contexts: ["browser_action"]
+      onclick: (info) -> window.OmegaContextMenuQuickSwitchHandler(info)
+    })
+
   chrome.contextMenus.create({
-    id: 'enableQuickSwitch'
-    title: chrome.i18n.getMessage('contextMenu_enableQuickSwitch')
-    type: 'checkbox'
-    checked: false
+    title: chrome.i18n.getMessage('popup_reportIssues')
     contexts: ["browser_action"]
-    onclick: (info) -> window.OmegaContextMenuQuickSwitchHandler(info)
+    onclick: OmegaDebug.reportIssue
   })
 
-chrome.contextMenus.create({
-  title: chrome.i18n.getMessage('popup_reportIssues')
-  contexts: ["browser_action"]
-  onclick: OmegaDebug.reportIssue
-})
-
-chrome.contextMenus.create({
-  title: chrome.i18n.getMessage('popup_errorLog')
-  contexts: ["browser_action"]
-  onclick: OmegaDebug.downloadLog
-})
+  chrome.contextMenus.create({
+    title: chrome.i18n.getMessage('popup_errorLog')
+    contexts: ["browser_action"]
+    onclick: OmegaDebug.downloadLog
+  })
diff --git a/omega-target-chromium-extension/src/module/external_api.coffee b/omega-target-chromium-extension/src/module/external_api.coffee
index 6768809..8f58534 100644
--- a/omega-target-chromium-extension/src/module/external_api.coffee
+++ b/omega-target-chromium-extension/src/module/external_api.coffee
@@ -22,7 +22,7 @@ module.exports = class ExternalApi
     return unless @disabled
 
     @options.setProxyNotControllable(null)
-    chrome.browserAction.setPopup({popup: 'popup/index.html'})
+    chrome.browserAction.setPopup?({popup: 'popup/index.html'})
     @options.reloadQuickSwitch()
     @disabled = false
     @options.clearBadge()
@@ -49,7 +49,7 @@ module.exports = class ExternalApi
           if @knownExts[port.sender.id] >= 32
             reason = 'upgrade'
           @options.setProxyNotControllable reason, {text: 'X', color: '#5ab432'}
-        chrome.browserAction.setPopup({popup: 'popup/index.html'})
+        chrome.browserAction.setPopup?({popup: 'popup/index.html'})
         port.postMessage({action: 'state', state: 'disabled'})
       when 'enable'
         @reenable()
diff --git a/omega-target-chromium-extension/src/module/inspect.coffee b/omega-target-chromium-extension/src/module/inspect.coffee
index 279ca64..7fa2375 100644
--- a/omega-target-chromium-extension/src/module/inspect.coffee
+++ b/omega-target-chromium-extension/src/module/inspect.coffee
@@ -8,6 +8,7 @@ module.exports = class Inspect
     @onInspect = onInspect
 
   enable: ->
+    return unless chrome.contextMenus?
     # We don't need this API. However its presence indicates that Chrome >= 35,
     # which provides the menuItemId we need in contextMenu callback.
     # https://developer.chrome.com/extensions/contextMenus
diff --git a/omega-target-chromium-extension/src/module/options.coffee b/omega-target-chromium-extension/src/module/options.coffee
index 42e8a90..a3d0228 100644
--- a/omega-target-chromium-extension/src/module/options.coffee
+++ b/omega-target-chromium-extension/src/module/options.coffee
@@ -78,7 +78,7 @@ class ChromeOptions extends OmegaTarget.Options
     if @_proxyNotControllable
       @setBadge()
     else
-      chrome.browserAction.setBadgeText(text: '')
+      chrome.browserAction.setBadgeText?(text: '')
     return
 
   _formatBypassItem: (condition) ->
@@ -261,7 +261,7 @@ class ChromeOptions extends OmegaTarget.Options
     if not @_quickSwitchContextMenuCreated
       @_quickSwitchContextMenuCreated = true
       if quickSwitch
-        chrome.contextMenus.update('enableQuickSwitch', {checked: true})
+        chrome.contextMenus?.update('enableQuickSwitch', {checked: true})
       window.OmegaContextMenuQuickSwitchHandler = (info) =>
         changes = {}
         changes['-enableQuickSwitch'] = info.checked
@@ -273,7 +273,7 @@ class ChromeOptions extends OmegaTarget.Options
             )
 
     if quickSwitch
-      chrome.browserAction.setPopup({popup: ''})
+      chrome.browserAction.setPopup?({popup: ''})
       if not @_quickSwitchInit
         @_quickSwitchInit = true
         chrome.browserAction.onClicked.addListener (tab) =>
@@ -290,7 +290,7 @@ class ChromeOptions extends OmegaTarget.Options
               return if url.substr(0, 4) == 'moz-'
               chrome.tabs.reload(tab.id)
     else
-      chrome.browserAction.setPopup({popup: 'popup/index.html'})
+      chrome.browserAction.setPopup?({popup: 'popup/index.html'})
     Promise.resolve()
 
   setInspect: (settings) ->
diff --git a/omega-target-chromium-extension/src/module/tabs.coffee b/omega-target-chromium-extension/src/module/tabs.coffee
index 4fda0ce..7dc5104 100644
--- a/omega-target-chromium-extension/src/module/tabs.coffee
+++ b/omega-target-chromium-extension/src/module/tabs.coffee
@@ -39,7 +39,7 @@ class ChromeTabs
   processTab: (tab, changeInfo) ->
     if @_badgeTab
       for own id of @_badgeTab
-        try chrome.browserAction.setBadgeText(text: '', tabId: id)
+        try chrome.browserAction.setBadgeText?(text: '', tabId: id)
         @_badgeTab = null
     if not tab.url? or tab.url.indexOf("chrome") == 0
       if @_defaultAction
@@ -56,8 +56,8 @@ class ChromeTabs
   setTabBadge: (tab, badge) ->
     @_badgeTab ?= {}
     @_badgeTab[tab.id] = true
-    chrome.browserAction.setBadgeText(text: badge.text, tabId: tab.id)
-    chrome.browserAction.setBadgeBackgroundColor(
+    chrome.browserAction.setBadgeText?(text: badge.text, tabId: tab.id)
+    chrome.browserAction.setBadgeBackgroundColor?(
       color: badge.color
       tabId: tab.id
     )
@@ -77,11 +77,11 @@ class ChromeTabs
 
   _chromeSetIcon: (params) ->
     try
-      chrome.browserAction.setIcon(params, @ignoreError)
+      chrome.browserAction.setIcon?(params, @ignoreError)
     catch
       # Some legacy Chrome versions will panic if there are other icon sizes.
       params.imageData = {19: params.imageData[19], 38: params.imageData[38]}
-      chrome.browserAction.setIcon(params, @ignoreError)
+      chrome.browserAction.setIcon?(params, @ignoreError)
 
   clearIcon: (tabId) ->
     return unless @_defaultAction?.icon?