Examine source code of ESO TwitchDrops

{
  "manifest_version": 2,
  "name": "ESO TwitchDrops",
  "description": "Check Twitch Drops for 'Elder Scrolls Online'.",
  "version": "1.0.2",
  "icons": {
    "96": "images/treasure-chest96.png"
  },
  "homepage_url": "https://github.com/Offerel/ESO-TwitchDrops-Extension",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "images/treasure-chest96.png",
    "default_title": "ESO TwitchDrops",
    "default_popup": "scripts/popup.html"
  },
  "permissions": [
    "https://eso-hub.com/*",
    "storage",
    "notifications"
  ]
}