Vk emoji change

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Vk emoji change",
  "description": "Change vk.com emojis to selected ones",
  "version": "0.1",
  "permissions": [
    "*://*.vk.com/*",
    "*://*.vkontakte.ru/*",
    "storage",
    "background",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://vk.com/*",
        "*://m.vk.com/*",
        "*://*.vkontakte.ru/*"
      ],
      "css": [
        "customEmojis.css"
      ],
      "js": [
        "customEmojis.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Change VK emojis"
  },
  "web_accessible_resources": [
    "emojis/*"
  ],
  "manifest_version": 2
}