Path for configureCommands is chosen based on user's browser (Opera incomatibility)

messaging.js

@@ -131,3 +131,16 @@ function stringAsRegExp(s, flags) {
 function wildcardAsRegExp(s, flags) {
 	return new RegExp(s.replace(/[{}()\[\]\/\\.+?^$:=!|]/g, "\\$&").replace(/\*/g, '.*?'), flags);
 }
+
+var configureCommands = {
+	get url () {
+		return navigator.userAgent.indexOf('OPR') > -1 ?
+			'opera://settings/configureCommands' :
+			'chrome://extensions/configureCommands'
+	},
+	open: () => {
+		chrome.tabs.create({
+			'url': configureCommands.url
+		});
+	}
+};

openOptions.js

@@ -1,3 +1,6 @@
+/* globals configureCommands */
+'use strict';
+
 document.querySelector('#manage-options-button').addEventListener("click", function() {
     if (chrome.runtime.openOptionsPage) {
         // Supported (Chrome 42+)
@@ -8,11 +11,7 @@ document.querySelector('#manage-options-button').addEventListener("click", funct
     }
 });
 
-document.querySelector('#manage-shortcuts-button').addEventListener("click", function() {
+document.querySelector('#manage-shortcuts-button').addEventListener("click", configureCommands.open);
-    chrome.tabs.create({
-        'url': 'chrome://extensions/configureCommands'
-    });
-});
 
 document.querySelector('#editor-styles-button').addEventListener("click", function() {
     chrome.tabs.create({

options/index.html

@@ -56,6 +56,7 @@
     2: <span i18n-text="optionsOpenManagerNote"></span>, <a href="#" data-cmd="open-keyboard">chrome://extensions/configureCommands</a>
   </div>
 
+  <script src="/messaging.js"></script>
   <script src="index.js"></script>
 </body>
 </html>

options/index.js

@@ -1,3 +1,4 @@
+/* globals configureCommands */
 'use strict';
 
 function restore () {
@@ -88,8 +89,9 @@ document.addEventListener('click', e => {
     });
   }
   else if (cmd === 'open-keyboard') {
-    chrome.tabs.create({
+    configureCommands.open();
-      url: 'chrome://extensions/configureCommands'
-    });
   }
 });
+// overwrite the default URL if browser is Opera
+document.querySelector('[data-cmd="open-keyboard"]').textContent =
+  configureCommands.url;

popup.js

@@ -1,3 +1,5 @@
+/* globals configureCommands */
+
 var writeStyleTemplate = document.createElement("a");
 writeStyleTemplate.className = "write-style-link";
 
@@ -238,11 +240,7 @@ document.querySelector('#popup-options-button').addEventListener("click", functi
     }
 });
 
-document.querySelector('#popup-shortcuts-button').addEventListener("click", function() {
+document.querySelector('#popup-shortcuts-button').addEventListener("click", configureCommands.open);
-    chrome.tabs.create({
-        'url': 'chrome://extensions/configureCommands'
-    });
-});
 
 // popup width
 document.body.style.width = (localStorage.getItem('popupWidth') || '246') + 'px';