Examine source code of WiDa

{
  "manifest_version": 2,
  "name": "WiDa",
  "version": "1.0",
  "description": "The dictionary definition for a selected, mouse pointed or manually input word",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f549e0b8-e20e-4b5f-b086-6908fa907fed}",
      "strict_min_version": "79.0"
    }
  },
  "icons": {
    "48": "edit-find-4-48.png",
    "96": "edit-find-4-96.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "common.js",
        "WiDa.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "defaults.js",
      "common.js",
      "background.js",
      "unicodejs.js",
      "unicodejs.emojiproperties.js",
      "unicodejs.derivedbidiclasses.js",
      "unicodejs.derivedcoreproperties.js",
      "unicodejs.derivedgeneralcategories.js",
      "unicodejs.characterclass.js",
      "unicodejs.textstring.js",
      "unicodejs.graphemebreakproperties.js",
      "unicodejs.graphemebreak.js",
      "unicodejs.wordbreakproperties.js",
      "unicodejs.wordbreak.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "commands": {
    "ShowSearchBox": {
      "suggested_key": {
        "default": "Ctrl+Space"
      },
      "description": "Shows an input box making it possible for the user to type a searched word"
    },
    "Alt1": {
      "suggested_key": {
        "default": "Alt+1"
      },
      "description": "Switches to the dictionary 1"
    },
    "Alt2": {
      "suggested_key": {
        "default": "Alt+2"
      },
      "description": "Switches to the dictionary 2"
    },
    "Alt3": {
      "suggested_key": {
        "default": "Alt+3"
      },
      "description": "Switches to the dictionary 3"
    },
    "Alt4": {
      "suggested_key": {
        "default": "Alt+4"
      },
      "description": "Switches to the dictionary 4"
    },
    "Alt5": {
      "suggested_key": {
        "default": "Alt+5"
      },
      "description": "Switches to the dictionary 5"
    },
    "Alt6": {
      "suggested_key": {
        "default": "Alt+6"
      },
      "description": "Switches to the dictionary 6"
    },
    "Alt7": {
      "suggested_key": {
        "default": "Alt+7"
      },
      "description": "Switches to the dictionary 7"
    },
    "Alt8": {
      "suggested_key": {
        "default": "Alt+8"
      },
      "description": "Switches to the dictionary 8"
    },
    "Alt9": {
      "suggested_key": {
        "default": "Alt+9"
      },
      "description": "Switches to the dictionary 9"
    }
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "edit-find-4-16.png",
      "32": "edit-find-4-32.png",
      "64": "edit-find-4-64.png"
    },
    "default_title": "WiDa",
    "default_popup": "toolbar_menu.html"
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ]
}