for #5: start browser action UI

webextension/manifest.json

@@ -5,8 +5,8 @@
 
   "description": "Containers works by isolating cookie jars using separate origin-attributes defined visually by colored ‘Container Tabs’. This add-on is a modified version of the containers feature for Firefox Test Pilot.",
   "icons": {
-    "48": "img/blok-48.png",
-    "96": "img/blok-96.png"
+    "48": "img/container-site-d-48.png",
+    "96": "img/container-site-d-96.png"
   },
 
   "applications": {
@@ -25,8 +25,8 @@
   "browser_action": {
     "browser_style": true,
     "default_icon": {
-      "16": "img/icon-50x50.png",
-      "32": "img/icon-50x50.png"
+      "16": "img/container-site-d-24.png",
+      "32": "img/container-site-d-48.png"
     },
     "default_title": "Containers",
     "default_popup": "popup.html"