Examine source code of RegretsReporter

{
  "name": "RegretsReporter",
  "version": "2.1.2",
  "description": "The RegretsReporter browser extension, built by the nonprofit Mozilla, helps you take control of your YouTube recommendations.",
  "homepage_url": "https://github.com/mozilla-extensions/regrets-reporter",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "incognito": "not_allowed",
  "icons": {
    "48": "/assets/icon/extension-icon.svg.48x48.png",
    "96": "/assets/icon/extension-icon.svg.96x96.png",
    "128": "/assets/icon/extension-icon.svg.128x128.png"
  },
  "permissions": [
    "*://*.youtube.com/*",
    "https://incoming.telemetry.mozilla.org/*",
    "storage",
    "alarms",
    "webRequest"
  ],
  "options_ui": {
    "chrome_style": false,
    "browser_style": false,
    "page": "/options/options.html"
  },
  "background": {
    "scripts": [
      "/background/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "/assets/icon/icon-toolbar-active.svg.38x38.png",
    "default_title": "RegretsReporter",
    "default_popup": "/popup/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "/content/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "/content/content.css",
    "/assets/icon/icon-toolbar-badge.svg.38x38.png",
    "*.woff",
    "*.woff2"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "regrets-reporter@mozillafoundation.org"
    }
  }
}