Examine source code of DarkWave — Smart Dark Mode

{
  "manifest_version": 3,
  "name": "DarkWave — Dark Mode for Sheets & Docs",
  "version": "1.1.0",
  "description": "Dark mode for Google Sheets™, Docs™ and every website. Adjust brightness & contrast, per-site toggle, no white flash.",
  "author": "DarkWave",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "storage",
    "scripting",
    "tabs",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "darkwave-css.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_origin_as_fallback": true
    }
  ],
  "commands": {
    "toggle-darkwave": {
      "suggested_key": {
        "default": "Alt+Shift+D",
        "mac": "Alt+Shift+D",
        "linux": "Alt+Shift+D"
      },
      "description": "Toggle DarkWave dark mode on/off"
    },
    "blacklist-site": {
      "suggested_key": {
        "default": "Alt+Shift+B",
        "mac": "Alt+Shift+B",
        "linux": "Alt+Shift+B"
      },
      "description": "Blacklist / un-blacklist the current site"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "darkwave@tjmanoj",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}