Examine source code of Excel Table Fixer

{
  "manifest_version": 2,
  "name": "Excel Table Fixer",
  "version": "1.2",
  "description": "Enhances the experience of pasting and editing tables in Gmail. Supports row and column selection, formatting, and cleanup.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "gmailmemo2@memoli.com",
      "strict_min_version": "91.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "https://mail.google.com/"
  ],
  "browser_action": {
    "default_title": "Excel Table Fixer"
  }
}