Examine source code of Bridgy

{
  "name": "Bridgy",
  "version": "0.7.0",
  "description": "Bridgy connects your web site to social media. This extension adds Facebook support.",
  "homepage_url": "https://brid.gy/",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "applications": {
    "gecko": {
      "id": "bridgy2@snarfed.org",
      "strict_min_version": "67.0"
    }
  },
  "permissions": [
    "*://*.brid.gy/*",
    "*://*.facebook.com/*",
    "alarms",
    "contextualIdentities",
    "cookies",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "persistent": true,
    "page": "background.html"
  },
  "icons": {
    "128": "bridgy_logo_128.jpg",
    "1024": "bridgy_logo_square_1024.jpg"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}