Do not reveal personal information inadvertently.
You may be “shedding” personal details, including e-mail addresses and other contact
information, without even knowing it unless you properly configure your Web browser. In your
browser’s “Setup”, “Options” or “Preferences” menus, you may wish to use a pseudonym
instead of your real name, and not enter an e-mail address, nor provide other personally
identifiable information that you don’t wish to share. When visiting a site you trust you can
choose to give them your info, in forms on their site; there is no need for your browser to
potentially make this information available to all comers. Also be on the lookout for system-
wide “Internet defaults” programs on your computer (some examples include Window’s Internet
Control Panel, and MacOS’s Configuration Manager, and the third-party Mac utility named
Internet Config).

While they are useful for various things, like keeping multiple Web browers and
other Internet tools consistent in how the treat downloaded files and such, they should
probably also be anonymized just like your browser itself, if they contain any fields for personal
information. Households with children may have an additional “security problem” – have you set
clear rules for your kids, so that they know not to reveal personal information unless you OK it
on a site-by-site basis?