Examine source code of Grasshopper

{
  "manifest_version": 3,
  "name": "Grasshopper",
  "version": "6664",
  "description": "Godspeed You Tab Emperor",
  "author": "Merkoba",
  "permissions": [
    "tabs",
    "sessions",
    "storage",
    "contextualIdentities",
    "cookies",
    "contextMenus",
    "tabGroups"
  ],
  "optional_permissions": [
    "history",
    "bookmarks",
    "clipboardRead",
    "scripting",
    "activeTab"
  ],
  "icons": {
    "128": "img/icon128.png"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": {
      "128": "img/icon128.png"
    },
    "default_title": "Grasshopper",
    "default_popup": "main.html?popup"
  },
  "sidebar_action": {
    "default_title": "Grasshopper",
    "default_panel": "main.html?sidebar",
    "default_icon": "img/icon128.png",
    "open_at_install": false
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Space"
      },
      "description": "Open the popup"
    },
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space"
      },
      "description": "Toggle the sidebar"
    },
    "popup_tabs": {
      "description": "Open the popup in Tabs mode"
    },
    "popup_history": {
      "description": "Open the popup in History mode"
    },
    "popup_bookmarks": {
      "description": "Open the popup in Bookmarks mode"
    },
    "popup_closed": {
      "description": "Open the popup in Closed mode"
    },
    "browser_command_1": {
      "description": "Browser Command 1"
    },
    "browser_command_2": {
      "description": "Browser Command 2"
    },
    "browser_command_3": {
      "description": "Browser Command 3"
    },
    "browser_command_4": {
      "description": "Browser Command 4"
    },
    "browser_command_5": {
      "description": "Browser Command 5"
    },
    "browser_command_6": {
      "description": "Browser Command 6"
    },
    "browser_command_7": {
      "description": "Browser Command 7"
    },
    "browser_command_8": {
      "description": "Browser Command 8"
    },
    "browser_command_9": {
      "description": "Browser Command 9"
    },
    "browser_command_10": {
      "description": "Browser Command 10"
    },
    "popup_command_1": {
      "description": "Popup Command 1"
    },
    "popup_command_2": {
      "description": "Popup Command 2"
    },
    "popup_command_3": {
      "description": "Popup Command 3"
    },
    "popup_command_4": {
      "description": "Popup Command 4"
    },
    "popup_command_5": {
      "description": "Popup Command 5"
    },
    "popup_command_6": {
      "description": "Popup Command 6"
    },
    "popup_command_7": {
      "description": "Popup Command 7"
    },
    "popup_command_8": {
      "description": "Popup Command 8"
    },
    "popup_command_9": {
      "description": "Popup Command 9"
    },
    "popup_command_10": {
      "description": "Popup Command 10"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{23aee10d-1130-4694-80ef-428e287ba83d}"
    },
    "data_collection_permissions": {
      "required": [
        "none"
      ]
    }
  }
}