Dark mode

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs++TX0PDACyfuQFzNLL1T8RKmEdxPegTQmPxjvseZwidiH+AXM/reLERcQoEMclP6da33icXDuxfoxKcJsXtDKzLTwNoIgduZLMw+C6RPNcTvD/2pSaqb7Uwglo7mDPUxirBEo9Q9Ja0UStBt0HOjHQN74ntUBLtntK3wauxnCeOw/208d+R/gqX9w3A6lq/FZiLzO+uioFWVnJZvZsQvB13wgSiJP/wk1poYOfVCECq+4/N4q83Hu4EaehbUsyaDSSValWfkj0PK/wGitYttg9KqmwhFoypJCzZkUaELw+nD9cKW1NZt59APe60B+XMWvTjipJ4LxpMElUn2+cK8wIDAQAB",
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "version": "2.2.21",
  "description": "__MSG_extension_description__",
  "default_locale": "en",
  "browser_action": {
    "default_title": "Dark mode for all websites",
    "default_icon": {
      "19": "icons/dr_active_19.png",
      "38": "icons/dr_active_38.png"
    },
    "default_popup": "ui/popup/index.html"
  },
  "icons": {
    "16": "icons/dr_16.png",
    "48": "icons/dr_48.png",
    "128": "icons/dr_128.png"
  },
  "background": {
    "persistent": true,
    "page": "background/index.html"
  },
  "externally_connectable": {
    "matches": [
      "https://*.captain.works/*"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inject/fallback.js",
        "inject/index.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "permissions": [
    "fontSettings",
    "storage",
    "tabs",
    "<all_urls>",
    "identity"
  ],
  "commands": {
    "toggle": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      },
      "description": "__MSG_toggle_extension__"
    },
    "addSite": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "__MSG_toggle_current_site__"
    },
    "switchEngine": {
      "description": "__MSG_theme_generation_mode__"
    }
  }
}