Examine source code of Salesforce Session

{
  "manifest_version": 3,
  "name": "Salesforce Session",
  "description": "Easily copy your session ID from any Salesforce Org",
  "version": "1.1",
  "author": "Aditya Kumawat",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "salesforce-session-copy@adityakumawat.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.salesforce.com/*",
        "https://*.force.com/*",
        "https://*.lightning.force.com/*",
        "https://*.visualforce.com/*",
        "https://*.cloudforce.com/*"
      ],
      "js": [
        "support.js"
      ]
    }
  ],
  "action": {
    "default_title": "Click to Copy Session ID"
  },
  "host_permissions": [
    "https://*.salesforce.com/*",
    "https://*.force.com/*",
    "https://*.lightning.force.com/*",
    "https://*.visualforce.com/*",
    "https://*.cloudforce.com/*",
    "https://*.salesforce-setup.com/*"
  ],
  "permissions": [
    "scripting",
    "activeTab",
    "tabs",
    "cookies",
    "contextMenus",
    "notifications"
  ]
}