Examine source code of FFHash

{
  "manifest_version": 2,
  "name": "FFHash",
  "description": "HashIds Hash/Dehash IDs Chrome extension",
  "homepage_url": "https://github.com/tupolev/ffhash",
  "version": "0.1.3",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "browser_action": {
    "default_icon": "icon32.png",
    "default_title": "FFHash",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "FFHash@FFHash"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "linux": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Open FFHash popup window"
    }
  }
}