diff --git a/omega-target-chromium-extension/overlay/manifest-firefox.json b/omega-target-chromium-extension/overlay/manifest-firefox.json
index 51db3eac..b3bfc584 100644
--- a/omega-target-chromium-extension/overlay/manifest-firefox.json
+++ b/omega-target-chromium-extension/overlay/manifest-firefox.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Proxy SwitchyOmega 3 (ZeroOmega)",
-  "version": "3.3.12",
+  "version": "3.3.13",
   "description": "__MSG_manifest_app_description__",
   "icons": {
     "16": "img/icons/omega-action-16.png",
diff --git a/omega-target-chromium-extension/src/coffee/background.coffee b/omega-target-chromium-extension/src/coffee/background.coffee
index 1e37c6d2..24294d5b 100644
--- a/omega-target-chromium-extension/src/coffee/background.coffee
+++ b/omega-target-chromium-extension/src/coffee/background.coffee
@@ -16,7 +16,7 @@ chrome.runtime.onStartup.addListener ->
 
 
 
-chrome.contextMenus.onClicked.addListener((info, tab) ->
+chrome.contextMenus?.onClicked.addListener((info, tab) ->
   options?.ready.then( ->
     switch info.menuItemId
       when 'inspectPage', 'inspectLink', 'inspectElement', 'inspectFrame'
diff --git a/omega-target-chromium-extension/src/coffee/background_preload.coffee b/omega-target-chromium-extension/src/coffee/background_preload.coffee
index 0019d096..32d79962 100644
--- a/omega-target-chromium-extension/src/coffee/background_preload.coffee
+++ b/omega-target-chromium-extension/src/coffee/background_preload.coffee
@@ -6,6 +6,7 @@ globalThis.zeroDetectModeCB = null
 globalThis.startupCheck = undefined
 
 initContextMenu = ->
+  return unless chrome.contextMenus
   chrome.contextMenus.removeAll()
   chrome.contextMenus.create({
     id: 'enableQuickSwitch'
@@ -23,7 +24,7 @@ initContextMenu = ->
 
 initContextMenu()
 
-chrome.contextMenus.onClicked.addListener((info, tab) ->
+chrome.contextMenus?.onClicked.addListener((info, tab) ->
   switch info.menuItemId
     when 'reportIssue'
       OmegaDebug.reportIssue()