Examine source code of Ep Bookmarks

{
  "manifest_version": 2,
  "name": "EP Bookmarks",
  "version": "1.2",
  "description": "Track your watched episode count for any streaming site using browser bookmarks",
  "icons": {
    "48": "icons/-1-48.png"
  },
  "browser_action": {
    "default_icon": "icons/-1-48.png",
    "default_title": "Add to EP Bookmarks"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "bookmarks",
    "tabs",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4d8a29f-8d61-416a-910e-436a6b30b135}"
    }
  }
}