Building Selenium IDE TNG On MacOS

Download MacPorts from

If you had a terminal session open, close it and start a new one to reload the environment path.

Check the port command is available.

which port


Install yarn.

sudo port install yarn

Check yarn is running.

yarn --version


Login to your GitHub account and fork the selenium-ide repo so you can contribute patches back to the source.

Clone the repo to your box:

git clone <your-github-email>:<your-github-id>/selenium-ide.git

This creates a selenium-ide directory under the current directory.

Go to that directory.

Add some missing yarn packages:

yarn add webpack

Build the extension.

yarn build


  [19] ./LocatorBuilders.js 13.3 kB {0} [built]

    + 5 hidden modules

Child html-webpack-plugin for “panel.html”:

     1 asset

       [0] ../node_modules/html-webpack-plugin/lib/loader.js!./panel.html 14.9 kB {0} [built]

        + 3 hidden modules

  Done in 3.05s.

You are now ready to add the extension to Chrome or Firefox.

Open Firefox version 55 or higher and follow these instructions:

  • enter “about:debugging” in the URL bar
  • click “Load Temporary Add-on”
  • open the extension’s directory and select any file inside the extension.

In this case you’ll look for the selinium-ide/build/manifest.json file and select that to enabled the IDE.

You should now see the Se button on the browser and when clicked get the “Selenium IDE TNG” window which is very much a work in progress.

Selenium IDE TNG 2017-09-20_15-41-41.png

2 thoughts on “Building Selenium IDE TNG On MacOS

  1. @Lance Cleveland – I’m very glad to see a blog post mentioning the new IDE. A few comments if you will:
    – no need to install Port
    – After cloning the repository all you need to do is run `yarn`
    – then you run `yarn build`
    – and all is left to open the browser’s extension page and, under developers mode, navigate to the /build folder where the manifest file is
    all is explained in the README

    1. Yarn is not installed on MacOS by default. Users will either need to install port or brew to get yarn installed. I chose port.

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