Theme of New Tab

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_extension_name__",
  "version": "1.5",
  "manifest_version": 2,
  "description": "__MSG_extension_description__",
  "homepage_url": "https://atavi.com",
  "icons": {
    "128": "icon128.png"
  },
  "default_locale": "en",
  "background": {
    "page": "background/page.html"
  },
  "page_action": {
    "default_icon": "i/icon19.png",
    "default_title": "__MSG_pageaction_title__",
    "default_popup": "create/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start",
      "js": [
        "AtaviExt.js",
        "includes/common.js"
      ],
      "css": [
        "c/common.css"
      ]
    }
  ],
  "omnibox": {
    "keyword": "atavi"
  },
  "options_page": "options/import.html",
  "web_accessible_resources": [
    "includes/inject.js",
    "config.json"
  ],
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "MacCtrl+Shift+S"
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "bookmarks",
    "history",
    "topSites",
    "tabs",
    "cookies",
    "storage",
    "<all_urls>"
  ],
  "optional_permissions": [
    "topSites"
  ],
  "externally_connectable": {
    "matches": [
      "*://*.atavi.com/*",
      "*://*.atavi.test/*"
    ]
  }
}