Add a bookmark to the MacBook Air Dock

On your MacBook Air running macOS 26.5, open Safari and go to the website you want to add.

Click the Share button in the Safari toolbar, choose Add to Dock, and then click Add.

Safari creates a web app for the website. Its icon is added to the Dock and to Applications, where you can also find it using Spotlight. If you were already signed in to the website, you’ll generally remain signed in to the web app.

If you later want to remove the web app from the Dock, Control-click its Dock icon, choose Options, and select Remove from Dock.

For Apple’s instructions, see Turn a website into an app in Safari on Mac.

Yes, a bookmark (URL) can be added to the Dock. There is a very simple drag-and-drop way to accomplish your goal, and it works in Safari and 3rd party browsers, e.g. Firefox. Unlike the Share method, this method does not add anything to your Applications folder (to me, that's needless clutter).

How to add website to the Dock

• Click in the URL/address bar of the browser window
• Click the icon to the left of the website URL (for example, the Apple icon for these forums) and drag that to the Dock, on the right side (or lower portion), the part of the Dock with the Trash can

Here's the click-and-drag to the Dock:

...and here's the bookmark present on the Dock:

More info from Apple: Use the Dock on Mac - Apple Support

Sometimes, the Internet suggests solutions that are more complicated than they need to be.