To use Polyflow you need to have the Chrome browser installed in your computer and also add our extension to the browser. In this link you will find the instructions to install the Google Chrome browser.
Once you have installed it you will have to add the Polyflow extension to Chrome.
Install Polyflow browser extension
Add our extension to your Chrome browser, you can find it here. Open the Extensions by clicking the puzzle icon next to the three-dot icon. Click the extension pushpin icon to pin the extension to Chrome and start using Polyflow.