Examine source code of LUTV Score Blocker

{
  "manifest_version": 2,
  "name": "LUTV Score Blocker",
  "version": "1.2",
  "description": "Removes scorelines from LUTV pages",
  "icons": {
    "48": "icons/soccer-ball.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://video.leedsunited.com/*"
      ],
      "js": [
        "lutv-score-blocker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ec4d99c-d27f-4ff7-91b7-1c8e7ef50836}"
    }
  }
}