What does "Enable"/"Disable" "connection prompt" do?

[rokejulianlockhart (Mr. Beedell, Roke Julian Lockhart (RJLB))]

Context

1. github.com/orgs/community/discussions/144767#discussioncomment-12576333

2. @rokejulianlockhart

   “Debugging Support” leads the user to firefox-source-docs.mozilla.org/devtools-user/about_colon_debugging. It fixed my problem, too.

Example