Examine source code of Tab Shortcuts

{
  "manifest_version": 2,
  "name": "Tab Shortcuts",
  "version": "1.0.0",
  "description": "A Firefox extension that allows you to quickly see the shortcuts for your open tabs",
  "browser_specific_settings": {
    "gecko": {
      "id": "pierrebou91@tab-shortcuts",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/binder48.png",
    "96": "icons/binder96.png"
  },
  "permissions": [
    "tabs",
    "tabGroups",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "tab-shortcuts.js"
      ]
    }
  ]
}