add support for duplicating current tab

src/background/actions/operation.js

@@ -35,6 +35,8 @@ const exec = (operation, tab) => {
     return tabs.updateTabPinned(tab, false);
   case operations.TAB_TOGGLE_PINNED:
     return tabs.toggleTabPinned(tab);
+  case operations.TAB_DUPLICATE:
+    return tabs.duplicate(tab.id);
   case operations.ZOOM_IN:
     return zooms.zoomIn();
   case operations.ZOOM_OUT:

src/background/tabs.js

@@ -111,8 +111,12 @@ const toggleTabPinned = (current) => {
   updateTabPinned(current, !current.pinned);
 };
 
+const duplicate = (id) => {
+  return browser.tabs.duplicate(id);
+};
+
 export {
   closeTab, reopenTab, selectAt, selectByKeyword, getCompletions,
   selectPrevTab, selectNextTab, selectFirstTab, selectLastTab, reload,
-  updateTabPinned, toggleTabPinned
+  updateTabPinned, toggleTabPinned, duplicate
 };

src/shared/default-settings.js

@@ -33,6 +33,7 @@ export default {
     "r": { "type": "tabs.reload", "cache": false },
     "R": { "type": "tabs.reload", "cache": true },
     "zp": { "type": "tabs.pin.toggle" },
+    "zd": { "type": "tabs.duplicate" },
     "zi": { "type": "zoom.in" },
     "zo": { "type": "zoom.out" },
     "zz": { "type": "zoom.neutral" },

src/shared/operations.js

@@ -42,6 +42,7 @@ export default {
   TAB_PIN: 'tabs.pin',
   TAB_UNPIN: 'tabs.unpin',
   TAB_TOGGLE_PINNED: 'tabs.pin.toggle',
+  TAB_DUPLICATE: 'tabs.duplicate',
 
   // Zooms
   ZOOM_IN: 'zoom.in',