Fall back in case of error in popup openOptions.

omega-target-chromium-extension/omega_target_popup.js

@@ -43,7 +43,7 @@ OmegaTargetPopup = {
     chrome.tabs.query({
       url: options_url
     }, function(tabs) {
-      if (tabs.length > 0) {
+      if (!chrome.runtime.lastError && tabs && tabs.length > 0) {
         var props = {
           active: true
         };