Examine source code of Supatabs - Tab Manager

{
  "manifest_version": 2,
  "name": "__MSG_ext_name__",
  "description": "__MSG_ext_description__",
  "default_locale": "en",
  "options_ui": {
    "page": "src/pages/options/index.html",
    "chrome_style": true,
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "src/pages/popup/index.html",
    "default_icon": {
      "34": "icon-34.png"
    }
  },
  "icons": {
    "128": "icon-128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "contextMenus",
    "http://*/*",
    "https://*/*"
  ],
  "commands": {
    "merge-selected": {
      "description": "Send selected tabs to Supatabs."
    },
    "merge-all": {
      "suggested_key": {
        "default": "Alt+A",
        "mac": "Alt+A"
      },
      "description": "Send all open tabs to Supatabs."
    },
    "merge-left": {
      "suggested_key": {
        "default": "Alt+L",
        "mac": "Alt+L"
      },
      "description": "Send all open tabs to the left to Supatabs."
    },
    "merge-right": {
      "suggested_key": {
        "default": "Alt+R",
        "mac": "Alt+R"
      },
      "description": "Send all open tabs to the right to Supatabs."
    },
    "open-app-tab": {
      "suggested_key": {
        "default": "Alt+O",
        "mac": "Alt+O"
      },
      "description": "Open or focus Supatabs."
    }
  },
  "web_accessible_resources": [
    "icon-128.png",
    "icon-34.png",
    "src/pages/options/index.html",
    "src/pages/popup/index.html"
  ],
  "version": "0.17.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{0fdd30f4-1afb-46b2-8f54-0ce6480f837c}"
    }
  }
}