Examine source code of Dark Mode (WebExtension)

{
  "version": "0.5.6",
  "name": "Dark Mode",
  "manifest_version": 3,
  "host_permissions": [
    "<all_urls>"
  ],
  "optional_permissions": [
    "alarms"
  ],
  "description": "A global dark theme for the web.",
  "homepage_url": "https://mybrowseraddon.com/dark-mode.html",
  "commands": {
    "_execute_action": {}
  },
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "options_ui": {
    "open_in_tab": true,
    "page": "data/options/options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "109.0",
      "id": "{174b2d58-b983-4501-ab4b-07e71203cb43}"
    }
  },
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "data/content_script/custom/*",
        "data/content_script/general/*",
        "data/content_script/page_context/inject.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "data/rules/rules.js",
      "lib/config.js",
      "lib/chrome.js",
      "lib/runtime.js",
      "lib/common.js"
    ]
  },
  "action": {
    "default_title": "Dark Mode",
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "run_at": "document_start",
      "exclude_globs": [
        "*/chrome/newtab*"
      ],
      "css": [
        "data/content_script/inject.css"
      ],
      "js": [
        "data/rules/rules.js",
        "data/content_script/inject.js",
        "data/content_script/vendor/tinycolor.js",
        "data/content_script/resources/native.js"
      ]
    }
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  }
}