Multi

About

Multi creates custom, lightweight macOS apps from a group of websites. Each app includes native notifications, file uploads, and dialogs. You can customize apps with JSON, CSS, and JavaScript, and you can inject custom JS and CSS into every page in an app. Apps can open each tab in its own window or use tabbed or floating windows.

Multi can be installed with Homebrew using brew install --cask multi, or by downloading the latest .dmg from the Releases page. Apps can be created and updated from the command line with the included create-mac-app script, which takes its options as environment variables. An app's settings are stored in a single JSON configuration file, which controls options such as its tabs, window behavior, notifications, and the browser used for external links.

Multi is open source under the GPL-3.0 license.