Table of Contents

Configuration

Disable Beep

In about:config set the value of the configuration parameter accessibility.typeaheadfind.soundURL to false

Disable Automatic Connections

See: How to stop Firefox from making automatic connections

DNS Prefetch

In about:config set the value of the configuration parameter network.dns.disablePrefetch to false in order to stop Firefox from performing DNS queries on every entry in your bookmarks list.