Examine source code of Rooster Auto LingQ

{
  "manifest_version": 2,
  "name": "AUTO LINGQ LESSONS",
  "description": "Automatically selects most popular LINGQ for all blue cards.",
  "version": "1.20",
  "content_scripts": [
    {
      "matches": [
        "https://www.lingq.com/*/learn/*/web/*/*",
        "https://www.lingq.com/*/learn/*/web/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "host_permissions": [
    "https://www.lingq.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{80395dd4-eed5-400d-a79e-3150c696ec74}"
    }
  }
}