Examine source code of FurAffinity Favs

{
  "manifest_version": 2,
  "name": "FA Favs",
  "version": "0.0.7",
  "permissions": [
    "*://*.furaffinity.net/*",
    "storage",
    "unlimitedStorage"
  ],
  "browser_action": {
    "default_title": "FA Favs",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "bg/tab.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+F"
      }
    }
  }
}