The extension "PowerZoom" is known to be adware or malicious, please use caution.
1. Risks Detail:
tr.js (User's history and search data tracking)
when you opened a new tab, it will send all of your data and search keywords to their servers (thess will slow down your network and browser), and inject code to you webpage to do more things than you can imagine!
2. User's Comments:
It is dangerous!