Unseenly

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Unseenly",
  "version": "2.0",
  "manifest_version": 2,
  "description": "Unseenly for Facebook hides the seen feature in Facebook chat and Messenger. Your friends can't know when you read their message",
  "background": {
    "scripts": [
      "settings/source/lib/store.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*",
        "*://*.messenger.com/*"
      ],
      "js": [
        "js/jquery.js",
        "js/hide_chat_seen.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.facebook.com/*",
    "*://*.messenger.com/*",
    "*://*.unseenly.com/*"
  ],
  "browser_action": {
    "default_icon": "img/icon48.png",
    "default_popup": "html/popup.html"
  },
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'"
}