Examine source code of Night Video Tuner

{
  "name": "Night Video Tuner",
  "version": "1.2.7",
  "description": "__MSG_manifest_description__",
  "author": "PyvesB",
  "homepage_url": "https://github.com/PyvesB/night-video-tuner",
  "default_locale": "en",
  "offline_enabled": true,
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "__MSG_adjust_video_properties__",
    "default_icon": "icons/icon-pause.png",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "filters/filters.js",
        "content/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "icons": {
    "48": "icons/icon-medium.png",
    "128": "icons/icon-large.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{2792fabf-b5c7-4d6f-8a76-01506885f2ce}"
    }
  }
}