sindresorhus/Plash v2.0.0 on GitHub

You can now add multiple websites and easily switch between them.
Added a preference to open external links in the default browser.
Added “Bring Browsing Mode to the front” preference.
Added the ability to inject custom JavaScript into a website.
Added the ability to force print styles for a website. (macOS 11-only)
Plash now adds a CSS class named “plash-is-browsing-mode” while browsing mode is active. You can use this to customize the website‘s appearance or behavior while it‘s in browsing mode.