Examine source code of Tabber

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "tabber@edgar-fouillet.fr",
      "strict_min_version": "54.0"
    }
  },
  "name": "Tabber",
  "version": "4.0.2resigned1",
  "default_locale": "en",
  "description": "__MSG_description__",
  "icons": {
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "64": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "browser_style": false,
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg",
      "64": "icons/icon.svg",
      "128": "icons/icon.svg"
    },
    "theme_icons": [
      {
        "size": 16,
        "light": "icons/icon_i.svg",
        "dark": "icons/icon.svg"
      },
      {
        "size": 32,
        "light": "icons/icon_i.svg",
        "dark": "icons/icon.svg"
      },
      {
        "size": 64,
        "light": "icons/icon_i.svg",
        "dark": "icons/icon.svg"
      },
      {
        "size": 128,
        "light": "icons/icon_i.svg",
        "dark": "icons/icon.svg"
      }
    ],
    "default_title": "Tabber",
    "default_popup": "popup/tabber.html"
  },
  "background": {
    "scripts": [
      "popup/js/data.js",
      "popup/js/common.js",
      "background/background.js"
    ]
  },
  "sidebar_action": {
    "default_title": "Tabber",
    "default_panel": "sidebar/tabber.html",
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg",
      "64": "icons/icon.svg",
      "128": "icons/icon.svg"
    }
  }
}