Examine source code of XKit Rewritten

{
  "manifest_version": 3,
  "name": "XKit Rewritten",
  "version": "1.3.5",
  "short_name": "XKit",
  "author": "April Sylph",
  "homepage_url": "https://github.com/AprilSylph/XKit-Rewritten/wiki",
  "description": "The enhancement suite for Tumblr's new web interface",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_title": "XKit Rewritten",
    "default_popup": "action/popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "64": "icons/64.png",
      "96": "icons/96.png",
      "128": "icons/128.png"
    }
  },
  "options_ui": {
    "page": "action/popup.html?embedded=true",
    "open_in_tab": false
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "*.js",
        "*.json",
        "*.css",
        "*.svg"
      ],
      "matches": [
        "*://www.tumblr.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.tumblr.com/*"
      ],
      "exclude_matches": [
        "*://www.tumblr.com/login",
        "*://www.tumblr.com/register",
        "*://www.tumblr.com/register?*",
        "*://www.tumblr.com/privacy/*"
      ],
      "run_at": "document_end",
      "js": [
        "browser_polyfill.js",
        "lib/jquery.slim.min.js",
        "content_scripts/main.js"
      ],
      "css": [
        "content_scripts/interface.css",
        "content_scripts/control_buttons.css",
        "content_scripts/meatballs.css",
        "content_scripts/sidebar.css",
        "content_scripts/modals.css",
        "content_scripts/notifications.css",
        "content_scripts/post_actions.css"
      ]
    }
  ],
  "minimum_chrome_version": "105",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e710c58-36cc-49d6-b772-bfc3030fa56e}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "128.0"
    },
    "gecko_android": {
      "strict_min_version": "128.0"
    }
  }
}