Examine source code of FF Font Super Enhancer

{
  "name": "FF Font Super Enhancer",
  "description": "Enhanced font rendering in Firefox!",
  "version": "2.22",
  "manifest_version": 2,
  "author": "ME",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "/images/fixfonts16.png",
    "32": "/images/fixfonts32.png",
    "48": "/images/fixfonts48.png",
    "128": "/images/fixfonts128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/fixfonts16.png",
      "32": "/images/fixfonts32.png",
      "48": "/images/fixfonts48.png",
      "128": "/images/fixfonts128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Firefox-font-super-enhancer@firefox",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}