Extensions are broken again with Chrome 139+

[nathanfallet]

See this post on StackOverflow for reference : https://stackoverflow.com/questions/79791856/how-to-load-extensions-in-chrome-version-139-using-playwright

We can use the cdp.extensions.loadUnpacked command to achieve the same behavior (run on startup). Should work with new Chrome versions, and older versions as well.

[nathanfallet]

Having a look at #51, we can see it requires more work than expected.