Push Notifications for Major Browsers

I need a push notification system that supports these major browsers:

- Chrome

- Firefox

- OSX Safari

- Edge

- Internet Explorer

- Android Chrome

- IOS Safari

The goal is for my Python scripts to send push notifications to our users via the requests library. I do not want to use an online service. I have a database to store the subscriptions and plan on sending dynamic content to varying subsets of users serval times throughout the day. I currently have Google's Web Push Notifications working fine, however Internet Explorer, Safari, and Edge do not function as expected. I followed a few tutorials to get to where I am so I am not completely knowledgeable of what is required to achieve what I am asking for. I assume this will be mostly JavaScript (service workers) with a potential pythonic interface.

You must be able to use your own keys for development and I will be using my own for the release version.

Skills: JavaScript, Node.js, Push Notification

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Project ID: #28355212