Examine source code of Schooltape

{
  "manifest_version": 2,
  "name": "Schooltape",
  "description": "Schooltape is a free, open-source, web extension that allows you to customise the look, feel, and functionality of Schoolbox!",
  "version": "4.5.3",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "homepage_url": "https://schooltape.github.io",
  "web_accessible_resources": [
    "*"
  ],
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Schooltape Settings",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "*://*/learning/quiz/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/end.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "*://*/learning/quiz/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/plugins.js",
        "content-scripts/snippets.js",
        "content-scripts/start.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ed9f069-9e53-46cf-bcdf-8324a7b0ec5d}"
    }
  }
}