uepselon

This plugin offers your blog visitors a <a href="http://www.foxload.com/firefox-download/" title="firefox download" rel="nofollow ugc">firefox download</a> button in different formats and colors on the sidebar.
Different banner formats and colors are included. The plugin use the wordpress locale settings for proper language versions of firefox.
You can place firefox buttons as widget and if your theme does not support widgets, you can place this <code><?php if(function_exists('get_foxload_button'))get_foxload_button(); ?></code> php code at the preferred position in your template.

Foxload Firefox Download

Offers your blog visitors a firefox download button in different formats and colors on the sidebar.

grizzlygmbh

This is a complete push notification solution for WordPress blogs and websites. Working with Firefox, Chrome and Safari.

WorldShaking Web Push Notifications

Really an easy way to add push notification service to a wordpress site. No programming skills needed.

Easy and quick way to add Web Push Notifiations

Increase engagement and drive more repeat traffic to your WordPress site with desktop push notifications. Now supporting Chrome, Firefox, and Safari.

Foxload Firefox Download vs WorldShaking Web Push Notifications