If would be interesting if you could allow a site to "open as application" (instead of open in new tab) - or this could even be called "install". The site would then appear in your OS like any other app, and may or may not have some of the browser chrome (URL bar, tabs, navigation buttons) depending on the site.
I currently have many pinned tabs - email, music - where I'd happily promote them to "apps". Even some of the real applications I use I only really use to get this behaviour (Slack comes to mind).
I'm a way, this is sort of similar to how Chrome OS works - just I want it on a real OS, I'm not at the point of being 100% web (or Electron-based) apps, and as a developer, probably never will be.
Sounds like you’re describing the Progressive Web App (PWA) install that Chrome recently added. Coming to Firefox (if not there already), and Edge. Not holding my breath for Safari though.
Mobile Safari supports PWAs and quite a bit of infra like service workers. Last time I looked it didn't work well in the background (reloads page on resume) but seems like they have most of the building blocks.
EDIT: This post [1] says background switching should be working in iOS 13.
Open the page you want to be an "app", and on the Chrome three-dot menu, select More Tools / Create Shortcut...
Edit the name as you wish and check the "Open as window" checkbox, then click OK.
Now you have a shortcut on your Start menu that works like any other app shortcut. You can pin it to the taskbar, save it to the desktop, any of the usual things. And when you open the app it will have its own window and its own icon on the taskbar.
This works on Windows and Linux at least - have not tried it on macOS.
You can do something similar in chromium/chrome by using the `app` flag. I set jupyterlab to launch with
chromium --disable-extensions --app=%s
which hides the URL bar and tabs, as well as disables any extensions. I'm sure it's possible to create a shortcut on Windows that does the same thing and place it on the desktop or what have you.
I currently have many pinned tabs - email, music - where I'd happily promote them to "apps". Even some of the real applications I use I only really use to get this behaviour (Slack comes to mind).
I'm a way, this is sort of similar to how Chrome OS works - just I want it on a real OS, I'm not at the point of being 100% web (or Electron-based) apps, and as a developer, probably never will be.