This one works as an extension so you don't need a new browser specifically for agents. It's easier to collaborate. Also if you run the MCP in non headless mode it brings to front the browser on every interaction, like opening a new page. With the extension this does not happen.

Another benefit is context usage.

The cli can also do a lot more than other MCPs because it uses code snippets run in a stateful sandbox to control the browser, so it can do virtually anything instead of just a few exposed tools like `scroll`, `click`

MCP eats lots of context (~20k tokens for chrome's). The more tokens you use needlessly, the faster your context rots (i.e., worse performance).