Examine source code of Piazza Enhancer

{
  "manifest_version": 2,
  "name": "Piazza Enhancer",
  "version": "1.0",
  "description": "Enhances Piazza's appearance with customizable themes and font options.",
  "permissions": [
    "storage",
    "webNavigation"
  ],
  "icons": {
    "48": "piazza.png",
    "96": "piazza.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "piazza.png",
    "default_title": "Piazza Enhancer",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://piazza.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "styles.css",
    "piazza.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "my-piazza-enhancer@mydomain.com",
      "strict_min_version": "58.0"
    }
  }
}