Examine source code of re:claimID

{
  "manifest_version": 2,
  "name": "re:claimID",
  "description": "An extension for use with re:claimID.",
  "version": "0.14.5",
  "applications": {
    "gecko": {
      "strict_min_version": "57.0"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b2d334a4-bcd4-476f-9122-4e85f8a71ec5}",
      "strict_min_version": "57.0"
    }
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/logo.png",
    "theme_icons": [
      {
        "light": "icons/logo_dark.png",
        "dark": "icons/logo.png",
        "size": 32
      }
    ],
    "default_title": "re:claimID",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "48": "icons/logo48.png",
    "96": "icons/logo96.png"
  },
  "background": {
    "scripts": [
      "background/reclaim.js",
      "scripts/gnunet.js"
    ]
  },
  "permissions": [
    "storage",
    "https://api.reclaim/*",
    "https://ui.reclaim/*",
    "http://localhost:7776/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "web_accessible_resources": [
    "*/**",
    "index.html",
    "*.js",
    "assets/*",
    "*.woff*",
    "*.ttf",
    "*.svg"
  ],
  "options_ui": {
    "page": "index.html",
    "open_in_tab": true,
    "browser_style": true,
    "chrome_style": true
  }
}