Timezone and language have to follow the exit

A proxy changes the exit. It does not change Intl, navigator.languages, or the timezone Chromium reports unless you make those follow the exit. A Dallas line with a host clock still set to the kitchen in Sydney is a coherence tell. Sites do not need a rare canvas hash if the clock and the IP argue.

This is an alignment note for accounts you have a right to open. It is not a ban checklist. If you do not have a right to the account, stop.

What has to follow

Timezone. Locale. Languages. Geolocation coordinates if the page asks the Geolocation API.

The exit country is the source of truth for that bundle. What proxies are is the beginner definition. Match the fingerprint to the exit geo is the operator version. Geolocation API versus the exit IP splits the two location doors. This page stays on clock and language.

How we align on launch

On profile start, MaskWright queries ip-api.com through the proxy when a proxy is set, or direct when it is not. The response updates timezone, locale, languages, and geolocation before the browser comes up. CDP applies Emulation.setTimezoneOverride. Launch also sets a TZ env. The inject writes navigator.language and languages.

At CDP apply, the page may probe ip-api.com or geojs.io again and realign. That traffic leaves the machine. There is no offline magic that invents an exit country.

You bring the HTTP or SOCKS5. We do not broker the line. A sticky exit keeps the story still. A rotating exit will move the country under cookies that did not move. That is a login problem, not a reason to reroll the seed.

Intl is a second clock

Intl.DateTimeFormat().resolvedOptions().timeZone is the usual read. Date.getTimezoneOffset is the older one. They have to agree with the CDP timezone override and with the TZ env on launch. A page that compares both will catch a half-applied profile.

Languages are a list, not a single en. navigator.language should be the first item of navigator.languages. A country that speaks Portuguese should not ship a lone en-US unless that is actually the operator's work language for that authorized account. Flavor lists that include five locales the exit would not explain are theater.

The geo lookup uses ip-api.com. The in-page probe may also hit geojs.io. Those hosts see an exit IP. That is traffic that leaves the machine. There is no MaskWright server holding the result. There is also no claim that the lookup is private beyond "we do not upload the profile."

Locale strings have to be a set

en-US and en-GB are not interchangeable flavor. Date formats, first day of week, and Accept-Language all move with the locale. CDP locale override and the inject languages should be one set. A header that says de-DE next to navigator.language of en-US is the same class of fork as a clock that ignored the exit.

I keep the set small. One primary, maybe one fallback. I do not pack a tourist list.

Geolocation coordinates are aligned to the same exit lookup. A clock in Paris next to a lat-long in Ohio is the sibling problem. I mention it here so you do not treat timezone as finished while the Geolocation API still tells the host city. Speech voices should follow the same locale set. A French clock with only US English voices is another leftover.

What alignment will not fix

A correct clock does not fix screen metrics. It does not fix hardwareConcurrency. It does not fix battery or media device IDs. Those fields still have to sound like one desktop.

A correct clock also does not authorize a second identity you do not own. Alignment is hygiene for a profile you already have a right to open.

How I check before work

I read the exit country. I read the timezone Chromium reports. I read navigator.languages. I ask whether a person in that country would have that language list. I do not invent a rare locale for flavor.

If the geo lookup failed, I do not launch and hope. The host clock will leak.

The parent bundle is what browser fingerprinting actually measures. The Browser fingerprinting cluster keeps this note on alignment so competitor titles that frame it as evasion do not set our outline.

FAQ

Does a proxy change my timezone automatically? Only if the profile aligns it. MaskWright looks up exit geo on start and updates timezone, locale, languages, and geolocation. A host VPN app does not do that for you.

What if the geo lookup fails? Do not launch and hope. The host clock will leak.

Is a long language list more realistic? Usually no. One primary and maybe one fallback. A tourist list is theater.