Examine source code of Twitter Demetricator

{
  "name": "Twitter Demetricator",
  "version": "1.6.1",
  "description": "Hides all the metrics on Twitter.",
  "homepage_url": "http://bengrosser.com/projects/twitter-demetricator/",
  "manifest_version": 2,
  "icons": {
    "16": "td-logo-16.png",
    "32": "td-logo-32.png",
    "48": "td-logo-48.png",
    "64": "td-logo-64.png",
    "128": "td-logo-128.png",
    "256": "td-logo-256.png",
    "512": "td-logo-512.png"
  },
  "browser_action": {
    "default_icon": "td-logo-128.png",
    "default_popup": "options.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "all_frames": true,
      "exclude_globs": [
        "*://*.twitter.com/i/cards/*",
        "*://platform.twitter.com/widgets/*",
        "*://analytics.twitter.com/*"
      ],
      "exclude_matches": [
        "*://*.twitter.com/i/cards/*",
        "*://platform.twitter.com/widgets/*",
        "*://analytics.twitter.com/*"
      ],
      "run_at": "document_start",
      "css": [
        "td.css"
      ],
      "js": [
        "jquery.min.js",
        "td.user.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "twitterdemetricator@bengrosser.com",
      "strict_min_version": "57.0"
    }
  }
}