Examine source code of Arweave

{
  "manifest_version": 2,
  "name": "Arweave",
  "description": "Arweave web archiver and wallet.",
  "version": "2.3.1",
  "options_ui": {
    "page": "main.html"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Arweave",
    "default_icon": "assets/icons/icon-128.png"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "app/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "app/content.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "contextMenus",
    "downloads",
    "<all_urls>"
  ],
  "icons": {
    "128": "assets/icons/icon-128.png"
  }
}