Examine source code of Video Roll

{
  "name": "__MSG_extension_name__",
  "version": "1.1.8",
  "manifest_version": 2,
  "description": "__MSG_extension_des__",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inject/index.js"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en_US",
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background/index.js"
    ],
    "persistent": true
  },
  "icons": {
    "16": "/icons/icon_16.png",
    "32": "/icons/icon_32.png",
    "48": "/icons/icon_48.png",
    "64": "/icons/icon_64.png",
    "128": "/icons/icon_128.png",
    "256": "/icons/icon_256.png",
    "512": "/icons/icon_512.png"
  },
  "web_accessible_resources": [
    "inject/index.js"
  ],
  "homepage_url": "https://videoroll.gomi.site",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "16": "/icons/icon_16.png",
      "32": "/icons/icon_32.png",
      "48": "/icons/icon_48.png",
      "64": "/icons/icon_64.png",
      "128": "/icons/icon_128.png",
      "256": "/icons/icon_256.png",
      "512": "/icons/icon_512.png"
    },
    "default_title": "Video Roll",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{98dc310a-d8a9-4fbd-9c15-587f1e9c0799}",
      "strict_min_version": "58.0"
    }
  }
}