Examine source code of Color Blind Map Fixer

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.1",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "strict_min_version": "56.0a1"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "menus",
    "<all_urls>"
  ],
  "icons": {
    "48": "icons/cbmf-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "cbmf.js"
      ]
    }
  ]
}