system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Whats going on when my URL bar sais about:blank?
gpt
When a browser sees "about:blank" that tells it to display a blank page.

Sometimes when bad coding or weird hiccups happen, your browser will open a new window, but fail to understand what's supposed to go in it, so it defaults to about:blank.