Adds IRC inspired CSS to the Facebook Messenger Web App.
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Facebook Messenger IRC Inspired Flat Theme

A Chrome extension that adds IRC inspired CSS to the Facebook Messenger Web App (

Download it here:

This extension changes the following:

  • Enables a dark, minimal theme for Facebook Messenger
  • Moves all messages to the left-hand side of the screen
  • Modifies image previews to be less intrusive and flow better in the conversation feed
  • Retains all functionality of Messenger
  • Second "IRC" mode for even more minimalism (See Below)



  • Enable this mode with a Click on the IRC button in the top left corner


  • Enable this mode with a Cmd/Ctrl + Click on the IRC button in the top left corner
  • This mode removes names from 1-on-1 conversations and only shows participant names in group conversations
  • Messages sent by the current user are prepended with a ">"
  • Messages sent by other participants are prepended with a "+"


This project uses ES6!

Clone the repo and npm install all of the necessary packages

git clone
npm install

To build the unpacked extension and run the watch task, run gulp


To build a distribution ready package, run gulp build --prod

gulp build --prod


  1. Create your feature branch: git checkout -b my-new-feature
  2. Commit your changes: git commit -m 'Add some feature'
  3. Push your branch: git push origin my-new-feature
  4. Submit a pull request! 📋

Feel free to help me add new features or improve my code!


This software is free to use under the MIT license. See the LICENSE file for license text and copyright information.