Examine source code of Lingueet

{
  "manifest_version": 2,
  "name": "Lingueet",
  "version": "1.1resigned1",
  "description": "Download .mp3 files from linguee pages",
  "icons": {
    "48": "icons/video-player.png"
  },
  "permissions": [
    "downloads"
  ],
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.linguee.de/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{84a01b10-f619-4d74-9820-5c2b2365c51d}"
    }
  }
}