Examine source code of Manga Reader Manager

{
  "manifest_version": 2,
  "name": "Manga Reader Manager",
  "version": "0.9.1",
  "description": "A Firefox extension to track and manage your Manga reading history.",
  "icons": {
    "48": "img/icon_48.png",
    "96": "img/icon_96.png",
    "128": "img/icon_128.png",
    "256": "img/icon_256.png",
    "512": "img/icon_512.png"
  },
  "background": {
    "scripts": [
      "src/utils.js",
      "src/websites/mangaread.js",
      "src/websites/mangakik.js",
      "src/websites/neatmanga.js",
      "src/websites/manhwatop.js",
      "src/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/icon_128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+M"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c8b0a46-dd9d-4206-ac62-cbae70a8b4f6}"
    }
  }
}