Examine source code of Tablist

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{a77435b4-77a2-4dde-82a0-805bdc09c259}",
      "strict_min_version": "58.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Tablist",
    "default_icon": {
      "32": "icons/icon-32.png",
      "64": "icons/icon-64.png"
    }
  },
  "description": "Simple tab listing addon for firefox",
  "homepage_url": "https://github.com/dejbug/tablist",
  "manifest_version": 2,
  "name": "Tablist",
  "permissions": [
    "tabs",
    "clipboardWrite"
  ],
  "version": "1.1"
}