Right now there are two ways to install the extension:

From the zip file. After downloading Snapfont from Gumroad, you'll get access to a zip file.
Read the instructions here to install from a zip file. We generally recommend this method if you want the latest version of Snapfont.

From the Chrome webstore. Head over to the Chrome webstore and install from there. This is the quickest method of installing Snapfont, but this version of Snapfont may be old as Chrome webstore takes 2-3 weeks to put the extension on the store.

Restart your browser and try again. If it still doesn't work, shoot us a message here and we'll get back to you as soon as possible.

These must be fonts locally installed on your device. At the moment we can't get in-depth font information for local fonts although we're trying to work around this limitation.

At the moment, no. However that is planned for the future updates.

That is the long term goal! However for the time being, we want to make sure Snapfont sturdy and reliably works across a wide variety of websites.

While Snapfont will eventually be a paid plugin, the old license key you got in your Gumroad email will still work with future updates.
This is done as a way of thanking the early supporters who used Snapfont.

So no, you won't need to get a new license key for future updates.

Absolutely. It is the top priority on our todo list.
Unfortunately, Chrome extensions take about 1-3 weeks to get approved before they are up on the webstore.

Because of this, variable font support is still a few weeks away.