Recaptcha v3 explicitly bans any browser that isn't one of "the two most recent major versions"[1] of Chrome, Firefox, Safari, or Edge. I don't mean it falls back to showing you an annoying select-the-picture quiz; if Google doesn't like your browser, the recaptcha widget replaces itself with:
> Please upgrade to a supported browser to get a reCAPTCHA challenge.
There are many reasons this is bad, but for now I'll point out that creating barriers that prevent new competitors from entering an established market is the behavior of a monopolist abusing their power over a market.