• Build your own custom macOS apps with different webviews
• Switch between the tabs with ⌘ shortcuts
• Bridge web notifications to macOS Notification Center
• Native Cut/Copy/Paste/Quit controls

Read more about the motivation and process on my blog: https://kofi.sexy/blog/multi.

./create-mac-app <YOUR_APP_NAME> <YOUR_ICON_PNG_PATH>
open <YOUR_APP_NAME>.app/Contents/Resources/config.json # edit your app's websites
open <YOUR_APP_NAME>.app # open and use your custom app

These instructions were developed and tested with Swift 4.2 on macOS 10.13 High Sierra.