Examine source code of SuperTables

{
  "manifest_version": 3,
  "name": "SuperTables",
  "version": "2.4",
  "description": "Firefox extension for enhancing tables in webpages",
  "browser_specific_settings": {
    "gecko": {
      "id": "gaurav_bhatnagar@live.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting"
  ],
  "action": {
    "default_title": "SuperTables",
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js",
        "scripts/storage.js",
        "scripts/helpers.js",
        "scripts/infobar.js"
      ]
    }
  ],
  "commands": {
    "show-pinned-filters": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      },
      "description": "Show list of pinned filters"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/Filter/sort.png",
        "icons/Filter/stats.png",
        "icons/Filter/graph.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}