Examine source code of Dumping Cloud - Salesforce File Manager

{
  "manifest_version": 3,
  "name": "Dumping Cloud - Salesforce File Manager",
  "version": "1.43",
  "browser_specific_settings": {
    "gecko": {
      "id": "dc-ayan-addon@ayansoftwares.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "A Quick & Easy way to manage every salesforce File(s) and its actions, without Leaving the Salesforce Object or Record Page.",
  "permissions": [
    "cookies",
    "activeTab",
    "tabs",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://*.force.com/*",
    "https://*.salesforce.com/*",
    "https://*.my.salesforce.com/*",
    "https://*.lightning.force.com/*",
    "https://*.my.salesforce-setup.com/*",
    "https://api.dumpingcloud.com/api/v1/translate/document/*"
  ],
  "icons": {
    "16": "dumping-icon-16.png",
    "32": "dumping-icon-32.png",
    "128": "dumping-icon-128.png",
    "180": "dumping-icon-180.png"
  },
  "action": {
    "default_title": "Dumping Cloud",
    "default_icon": {
      "16": "dumping-icon-16.png",
      "32": "dumping-icon-32.png",
      "128": "dumping-icon-128.png",
      "180": "dumping-icon-180.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.force.com/*",
        "https://*.salesforce.com/*",
        "https://*.my.salesforce.com/*",
        "https://*.lightning.force.com/*",
        "https://*.my.salesforce-setup.com/*"
      ],
      "js": [
        "pdf-lib.min.js",
        "pdf.min.js",
        "jszip.min.js",
        "docx-preview.min.js",
        "html2canvas.min.js",
        "sfv-content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "viewall.html",
        "pdf.worker.min.js",
        "pdf-lib.min.js",
        "pdf.min.js",
        "jszip.min.js",
        "docx-preview.min.js",
        "html2canvas.min.js",
        "sfv-template.html",
        "sfv-styles.css",
        "header.png",
        "footer.png",
        "dumping-icon-16.png",
        "delete-icon.png",
        "download-icon.png",
        "copy-icon.png",
        "move-icon.png",
        "compare-icon.png",
        "preview-icon.png",
        "watermark-icon.png",
        "translation-icon.png",
        "merge-icon.png",
        "zip-icon.png",
        "rename-icon.png",
        "split-icon.png",
        "file_converter-icon.png"
      ],
      "matches": [
        "https://*.force.com/*",
        "https://*.salesforce.com/*",
        "https://*.my.salesforce.com/*",
        "https://*.lightning.force.com/*",
        "https://*.my.salesforce-setup.com/*"
      ]
    }
  ]
}