Examine source code of BuddyLink

{
  "manifest_version": 2,
  "name": "BuddyLink",
  "description": "Save your bookmarks in the cloud",
  "version": "2.0.0",
  "permissions": [
    "storage",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": "icon/icon-64.png",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "settings/settings.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "32": "icon/icon-32.png",
    "64": "icon/icon-64.png",
    "128": "icon/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dcdc4c3f-5dcb-467e-85c8-6cd20dc62b85}"
    }
  }
}