Examine source code of Reddit Media Saver

{
  "manifest_version": 2,
  "name": "Reddit Media Saver",
  "version": "1.1.3",
  "description": "Save Reddit videos, GIFs, gallery media, and full-size images with clean post-based filenames and configurable JPEG conversion.",
  "homepage_url": "https://extensions.maxiol.com/reddit-media-saver/",
  "permissions": [
    "menus",
    "downloads",
    "storage",
    "tabs",
    "*://reddit.com/*",
    "*://*.reddit.com/*",
    "*://redd.it/*",
    "*://*.redd.it/*",
    "*://redgifs.com/*",
    "*://*.redgifs.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://reddit.com/*",
        "*://*.reddit.com/*",
        "*://redd.it/*",
        "*://*.redd.it/*",
        "*://redgifs.com/*",
        "*://*.redgifs.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-media-saver@maxiol.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}