Examine source code of Soda PDF

{
  "manifest_version": 2,
  "name": "Soda PDF Online (unofficial)",
  "version": "1.0.0",
  "description": "Quick helper to open PDFs in Soda PDF Online (unofficial). This extension is NOT affiliated with Soda PDF.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "icons": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Open PDF with Soda Online",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_script.js"
      ],
      "css": [
        "inject.css"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "soda-pdf-online-unofficial@example",
      "strict_min_version": "60.0"
    }
  }
}