Examine source code of Multilevel Speed Dial

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0.4f",
  "default_locale": "en",
  "developer": {
    "name": "__MSG_developerName__",
    "url": "https://github.com/PowercoderJr/MultilevelSpeedDial"
  },
  "icons": {
    "8": "icons/icon.svg",
    "16": "icons/icon.svg",
    "24": "icons/icon.svg",
    "32": "icons/icon.svg",
    "40": "icons/icon.svg",
    "48": "icons/icon.svg",
    "56": "icons/icon.svg",
    "64": "icons/icon.svg",
    "72": "icons/icon.svg",
    "80": "icons/icon.svg",
    "88": "icons/icon.svg",
    "96": "icons/icon.svg",
    "104": "icons/icon.svg",
    "112": "icons/icon.svg",
    "120": "icons/icon.svg",
    "128": "icons/icon.svg",
    "136": "icons/icon.svg",
    "144": "icons/icon.svg",
    "152": "icons/icon.svg",
    "160": "icons/icon.svg",
    "168": "icons/icon.svg",
    "176": "icons/icon.svg",
    "184": "icons/icon.svg",
    "192": "icons/icon.svg",
    "200": "icons/icon.svg"
  },
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "optional_permissions": [
    "history",
    "tabHide",
    "downloads"
  ],
  "chrome_settings_overrides": {
    "homepage": "mlsd.html"
  },
  "chrome_url_overrides": {
    "newtab": "mlsd.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "bundles/kbd-navigation.js"
      ],
      "css": [
        "kbd-navigation.css"
      ],
      "match_about_blank": true,
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "bundles/background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "multilevelspeeddial@powercoder.org",
      "strict_min_version": "61.0"
    }
  },
  "browser_action": {
    "default_title": "__MSG_extensionName__",
    "default_icon": "icons/icon.svg",
    "default_popup": "toolbar-menu.html",
    "browser_style": true
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "web_accessible_resources": [
    "kbd-navigation.css",
    "icons/folder.svg",
    "icons/close.svg",
    "icons/nothing-found.svg",
    "icons/hidden-miniature-placeholder.svg",
    "fonts/FiraSans-Regular.ttf",
    "fonts/FiraSans-Heavy.ttf"
  ]
}