A browser choice screen is a prompt that asks a user to select a web browser instead of silently receiving one preselected default. It is meant to reduce default bias, where people keep the first option simply because it is easiest.
In cybersecurity, this matters because the browser is a major gateway to web apps, downloads, identity prompts, cookies, and permission requests. If users actively choose a browser, they may be less likely to accept bundled software or insecure defaults without thinking. For defenders, choice screens can change which browsers must be supported, tested, and hardened, and they can affect how security guidance is rolled out across an organization. Attackers also benefit from user inertia, so any interface that forces a deliberate decision can make social engineering and unwanted preselection harder.