Everyday Digital Skills
Why a website can still load after the connection drops
Some websites keep loading without a connection because a service worker saved resources. Learn what offline access does—and does not—tell you about a site’s data.
ACCOUNTS · DEVICES · PRIVACY
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Practical Computing
Persistent browser storage changes eviction rules, not your backup plan
Persistent browser storage can protect site data from automatic eviction, but it is not a backup. Check what an offline app can export before relying on it.
Software and Security
Browser site isolation separates more than the tabs you can see
Browser site isolation adds boundaries between website content. Understand why process counts do not map neatly to tabs and what this protection cannot do.
Software and Security
App sandboxing limits access without making every app trustworthy
An app sandbox restricts what software can reach, while permissions and the information you provide still shape privacy risk.
Account Security
Passkey attestation answers a different question from signing in
WebAuthn attestation concerns an authenticator’s provenance during registration. Separate it from the proof used at sign-in and consider the privacy trade-off.
Home Networks
A failed DNS lookup can stay cached after the record is fixed
A newly created DNS record can still appear absent because a resolver cached an earlier negative answer. Learn what to check before changing it again.