Issue With Firebase Authentication: "The XMLHttpRequest compatibility library was not found."


I am using firebase authentication in my Frontity project. I have followed the exact same steps to integrate it in a regular react app, and it worked perfect fine. When doing the same in Frontity, I receive an error saying “Error: The XMLHttpRequest compatibility library was not found.”. I have done quite a bit of looking around and I am not 100% but it seems as though this is an issue with webpack. As I am also very new to web development, I am not familiar with what the exact function of web pack is but I am pretty certain that I need to edit some items in the webpack.config.json. I came to this conclusion from seeing this post from github and a terminal output directly form firebase/app telling me to add that to the configuration (included below). I have done that but In order to apply those changes, I need to edit the webpack script from “webpack” to “webpack —config webpack.config.js”. My question here is am I on the right path? If so, how do I edit that script?

System Info


  • OS: macOS 11.1
  • CPU: (8) x64 Intel(R) Core™ i7-4870HQ CPU @ 2.50GHz
  • Memory: 1.42 GB / 16.00 GB
  • Shell: 5.8 - /bin/zsh


  • Node: 14.15.3 - /usr/local/bin/node
  • npm: 6.14.9 - /usr/local/bin/npm


  • Chrome: 87.0.4280.88
  • Edge: Not Found
  • Firefox: Not Found
  • Safari: 14.0.2


 - @frontity/core: ^1.9.1 => 1.9.1 
 - @frontity/html2react: ^1.5.0 => 1.5.0 
 - @frontity/mars-theme: ./packages/mars-theme => 1.4.4 
 - @frontity/tiny-router: ^1.2.4 => 1.2.4 
 - @frontity/wp-source: ^1.10.0 => 1.10.0 
 - firebase: ^8.2.1 => 8.2.1 
 - firebase/analytics:  undefined ()
 - firebase/app:  undefined ()
 - firebase/auth:  undefined ()
 - firebase/database:  undefined ()
 - firebase/firestore:  undefined ()
 - firebase/firestore/bundle:  undefined ()
 - firebase/firestore/memory:  undefined ()
 - firebase/functions:  undefined ()
 - firebase/installations:  undefined ()
 - firebase/messaging:  undefined ()
 - firebase/performance:  undefined ()
 - firebase/remote-config:  undefined ()
 - firebase/storage:  undefined ()
 - frontity: ^1.13.0 => 1.13.0 
 - react-firebase-hooks: ^2.2.0 => 2.2.0 
 - react-firebase-hooks/auth:  undefined ()
 - react-firebase-hooks/database:  undefined ()
 - react-firebase-hooks/firestore:  undefined ()
 - react-firebase-hooks/storage:  undefined ()
 - xmlhttprequest: ^1.8.0 => 1.8.0 


 - frontity: Not Found
 - npx: Not Found

Output from Terminal:

Screen Shot 2021-01-03 at 1.49.25 PM

Code repository

Other Information:
Like I stated before, I’m coming from iOS Development, so all of this is pretty new to me. Thank you all for any help, it will be greatly appreciated!

Hi @kjeasterly31

Welcome to the Frontity community.

I’m going to refer this to a member of our development team who will be more familiar with the webpack configuration.

@luisherranz can you help?

@kjeasterly31 some questions:

  • The Firebase library that you are using requires change?
  • Do you need that library in the server only or also in the client?
  • Could you point me to the code (either npm or GH) for that library to take a look at its dependencies?


Any chance you’ve made any progress on using firebase with frontity? I’m receiving the same error you are.