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webtrex is the web extension for all projects; In February 2020, at the moment supports only fbtrex.

web extension reviewer

Dear reviewer, to rebuild the browser extension you've to run these commands:

npm install
npm run dist

This command shall produce a compressed file in dist/ This file is the one submitted to Firefox and Google store.

Developer? Prepare

Install dependencies:

npm install

Start the build process:

npm run build:watch


Launch a new instance of Firefox or Chromium (you need to run this from another terminal, since the previous command needs to keep running). For Firefox, run:

npm run start:firefox

For chromium, run:

npm run start:chromium

Important: keep in mind that those browser instances are temporary. If you close the browser or kill the process that launched the browser, all data will be lost. This is a feature, not a bug, since it allows you to always test the extension on a fresh install. Check the FAQ for more info.

The command will build the extension, run the linter, and pack it in a zip file.


I'm annoyed because I have to log in to the social network I'm testing all the time

Everytime you launch the browser you start with new cookies, new local storage, new everything. This means that if you open you have to enter email and password on a fresh browser start.

We have a dev feature called autologin. If you've followed the previous steps correctly, you should have a file called .env (that is a copy of .env_template). To enable autologin put your email in AUTOLOGIN_EMAIL and your password in AUTOLOGIN_PASSWORD. Reload the page and... voilà you are logged in. (OK to be honest sometimes facebook complains, just give it another try, it works!)

I need to test the extension in my browser and I want to load it manually

After the first successful execution of build:watch, you should find under the build directory the compiled extension. You can manually load the unpacked extension in your browser. If you need help, check how to do it on Firefox and Chrom(e|ium.

Adding new domains

Don't forget is to use the webextension-polyfill when working on new things.