move platform-specific images to their respective platform

platform/firefox/vapi-background.js

@@ -1463,7 +1463,7 @@ vAPI.toolbarButton.init = function() {
     this.styleURI = [
         '#' + this.id + ' {',
             'list-style-image: url(',
-                vAPI.getURL('img/browsericons/ff-icon16-off.svg'),
+                vAPI.getURL('img/browsericons/icon16-off.svg'),
             ');',
         '}',
         '#' + this.viewId + ', #' + this.viewId + ' > iframe {',
@@ -1675,7 +1675,7 @@ vAPI.toolbarButton.updateState = function(win, tabId) {
         icon = '';
     }
     else {
-        icon = 'url(' + vAPI.getURL('img/browsericons/ff-icon16.svg') + ')';
+        icon = 'url(' + vAPI.getURL('img/browsericons/icon16.svg') + ')';
     }
 
     button.style.listStyleImage = icon;
@@ -1766,7 +1766,7 @@ vAPI.contextMenu.register = function(doc) {
     var menuitem = doc.createElement('menuitem');
     menuitem.setAttribute('id', this.menuItemId);
     menuitem.setAttribute('label', this.menuLabel);
-    menuitem.setAttribute('image', vAPI.getURL('img/browsericons/ff-icon16.svg'));
+    menuitem.setAttribute('image', vAPI.getURL('img/browsericons/icon16.svg'));
     menuitem.setAttribute('class', 'menuitem-iconic');
     menuitem.addEventListener('command', this.onCommand);
     contextMenu.addEventListener('popupshowing', this.displayMenuItem);