Examine source code of main-currents

{
  "name": "main-currents",
  "description": "Detect propaganda and coordinated manipulation in online discourse",
  "version": "0.1.113",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "main-currents@main-currents.news",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "browser_action": {
    "default_popup": "src/popup.html"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*",
        "*://*.facebook.com/*",
        "*://*.twitter.com/*",
        "*://*.x.com/*",
        "*://*.bsky.app/*",
        "*://*.google.com/search*",
        "*://news.google.com/*",
        "*://*.linkedin.com/*",
        "*://news.ycombinator.com/*",
        "*://*.youtube.com/*",
        "*://*.threads.net/*"
      ],
      "js": [
        "src/link-highlighter.js"
      ],
      "css": [
        "src/link-highlighter.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "tabs",
    "scripting",
    "alarms",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "icon/*"
  ]
}