Examine source code of limito

{
  "manifest_version": 2,
  "name": "limito",
  "description": "Browser extension to help Canadian user aggregate registered account contribution room",
  "version": "1.0.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "webRequest",
    "storage",
    "cookies",
    "https://my.wealthsimple.com/*",
    "https://*.royalbank.com/*",
    "https://*.rbcroyalbank.com/*",
    "https://*.ams-sga.cra-arc.gc.ca/*",
    "https://*.canadalife.com/*",
    "https://easyweb.td.com/*",
    "https://*.questrade.com/*",
    "https://*.bmoinvestorline.com/*",
    "https://*.bmosmartfolio.com/*",
    "https://*.tangerine.ca/*",
    "http://127.0.0.1/*",
    "http://localhost/*",
    "https://limito.ca/*"
  ],
  "web_accessible_resources": [
    "icon/*.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "limito@limito.ca",
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ams-sga.cra-arc.gc.ca/*",
        "*://*.bmoinvestorline.com/*",
        "*://*.bmosmartfolio.com/*",
        "*://*.canadalife.com/*",
        "*://*.questrade.com/*",
        "*://*.rbcroyalbank.com/*",
        "*://*.royalbank.com/*",
        "*://*.tangerine.ca/*",
        "*://easyweb.td.com/*",
        "*://my.wealthsimple.com/*"
      ],
      "all_frames": true,
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "*://*.limito.ca/*",
        "*://127.0.0.1/*",
        "*://localhost/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/limito-web.js"
      ]
    }
  ]
}