Following this recent Topic, I decided to create an Extension and a UserScript for the same purpose of identifying banned users.

The script utilizes the list from https://loyce.club/bans/usernames.txt to identify banned users and works on both profiles and threads.

The Extension also includes a popup.html to toggle the active status on and off.







GITHUB

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Installation

Userscript:

• Use Tampermonkey, which works for both Chrome and Firefox.
• Add the script from bitcointalk-ban-checker-userscript
  
  

Extension:

• Only available for manual installation.
• Download the Source code to your local machine from Assets.
      
• Load the unpacked extension on chrome://extensions (Chrome) or about:debugging (Firefox) > Load Temporary Add-on.
      
• Unzip the source code and select the "Extension/" folder for Chrome, or select the "Extension/manifest.json" file for Firefox.