Examine source code of Manga Lazy Load

{
  "manifest_version": 2,
  "name": "__MSG_ml_extName__",
  "description": "__MSG_ml_extDescription__",
  "version": "2.0.2",
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage",
    "tabs",
    "*://mangapark.net/*",
    "*://*.mpizz.org/*",
    "*://bato.to/*",
    "*://*.mbwnp.org/*",
    "*://manganato.com/*",
    "*://*.2xstorage.com/*",
    "*://natomanga.com/*"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://mangapark.net/*",
        "*://bato.to/*",
        "*://manganato.com/*",
        "*://natomanga.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "icons": {
    "16": "icons/16px.png",
    "32": "icons/32px.png",
    "48": "icons/48px.png",
    "64": "icons/64px.png",
    "128": "icons/128px.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3cf02a51-9dc1-4fa8-813f-626800b6d731}",
      "strict_min_version": "70.0"
    }
  },
  "browser_action": {
    "default_title": "__MSG_ml_extName__",
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/128px.png"
    }
  }
}