Examine source code of CSV Reader

{
  "manifest_version": 3,
  "name": "CSV Reader",
  "version": "2.0.0",
  "description": "Skip the download: CSV Reader turns raw .csv pages into a clean, readable table right in your browser tab",
  "homepage_url": "https://github.com/rubenvar/csv-reader",
  "author": "Rubén Vara",
  "browser_specific_settings": {
    "gecko": {
      "id": "hey@rubenvara.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/csv-16.png",
    "32": "icons/csv-32.png",
    "48": "icons/csv-48.png",
    "64": "icons/csv-64.png",
    "96": "icons/csv-96.png",
    "128": "icons/csv-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/csv-16.png",
      "32": "icons/csv-32.png",
      "64": "icons/csv-64.png"
    },
    "default_popup": "popup.html",
    "default_title": "CSV Reader",
    "theme_icons": [
      {
        "dark": "icons/csv-16.png",
        "light": "icons/csv-light-16.png",
        "size": 16
      },
      {
        "dark": "icons/csv-32.png",
        "light": "icons/csv-light-32.png",
        "size": 32
      }
    ]
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*",
    "*://*/*.csv"
  ]
}