Examine source code of RevSeller

{
  "manifest_version": 2,
  "name": "RevSeller",
  "description": "Product research tool for third-party Amazon sellers that estimates FBA fees, margin, ROI, and details about Variations.",
  "version": "3.1.11",
  "icons": {
    "16": "img/icon16.png",
    "24": "img/icon24.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "64": "img/icon64.png",
    "128": "img/icon128.png",
    "256": "img/icon256.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon16.png",
      "24": "img/icon24.png",
      "32": "img/icon32.png",
      "48": "img/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "/lib/jquery-3.7.1.min.js",
      "/lib/mustache-4.2.0.min.js",
      "/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*.amazon.ca/*",
        "https://*.amazon.ca/*",
        "http://*.amazon.com/*",
        "https://*.amazon.com/*"
      ],
      "js": [
        "/lib/jquery-3.7.1.min.js",
        "/js/content-script-0.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "http://*.amazon.ca/*",
        "https://*.amazon.ca/*",
        "http://*.amazon.com/*",
        "https://*.amazon.com/*"
      ],
      "js": [
        "/lib/moment.js",
        "/lib/chart.js",
        "/lib/chartjs-adapter-moment.js",
        "/lib/chartjs-plugin-zoom.js",
        "/lib/stupidtable.modified.js",
        "/js/content-script-1.js"
      ],
      "css": [
        "/css/amazon.css",
        "/css/amazon-aod.css",
        "/css/rs-form.css",
        "/css/popup-export.css",
        "/css/widgets.css",
        "/css/storefront.css",
        "/css/amazon-serp.css",
        "/css/cs-lists.css",
        "/css/cs-competitive.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "http://*.amazon.ca/*",
        "https://*.amazon.ca/*",
        "http://*.amazon.com/*",
        "https://*.amazon.com/*"
      ],
      "js": [
        "/js/content-script-2.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://sellercentral.amazon.com/hz/fba/profitabilitycalculator/index*",
        "https://sellercentral.amazon.com/fba/profitabilitycalculator/index*",
        "https://sellercentral.amazon.com/fba/revenuecalculator/index*",
        "https://sellercentral.amazon.ca/hz/fba/profitabilitycalculator/index*",
        "https://sellercentral.amazon.ca/fba/profitabilitycalculator/index*",
        "https://sellercentral.amazon.ca/fba/revenuecalculator/index*"
      ],
      "js": [
        "/js/content-script-3.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://sellercentral.amazon.com/revcal*",
        "https://sellercentral.amazon.ca/revcal*"
      ],
      "js": [
        "/js/content-script-4.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://sellercentral.amazon.com/product-search/search?q=*",
        "https://sellercentral.amazon.ca/product-search/search?q=*"
      ],
      "js": [
        "/js/content-script-5.js"
      ],
      "run_at": "document_end"
    }
  ],
  "commands": {
    "sidebar-search": {
      "description": "Initiate Sidebar Search"
    }
  },
  "web_accessible_resources": [
    "/img/*",
    "/html/*",
    "/js/inject-*.js"
  ],
  "permissions": [
    "*://www.amazon.com/*",
    "*://www.amazon.ca/*",
    "*://*.images-amazon.com/*",
    "*://revseller.com/*",
    "https://sellercentral.amazon.com/*",
    "https://sellercentral.amazon.ca/*",
    "https://*.account.amazon.com/*",
    "identity",
    "activeTab",
    "storage",
    "contextMenus",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{48fb1dce-8d2b-4192-af92-4cc078dbba10}"
    }
  }
}