GeoMirror v1.2.1

GeoMirror v1.2.1

Chrome MV3 extension for aligning page-visible regional signals with the current
public exit IP.

Download and install

1. Download geomirror-v1.2.1-chrome.zip below.
2. Extract the ZIP.
3. Open chrome://extensions in Chrome.
4. Enable Developer mode.
5. Click Load unpacked and select the extracted GeoMirror-1.2.1 folder.
6. Open the GeoMirror popup and click Refresh.

Chrome does not support normal one-click installation of a self-hosted,
unsigned CRX on desktop. The ZIP is therefore distributed as a load-unpacked
package.

Highlights

• Automatically derives geolocation, timezone, locale/language, and
  Accept-Language from the current exit-IP profile.
• Adds masking for common Chinese system/vendor font probes when the exit
  profile is non-Chinese.
• Prevents the initial page read from leaking Asia/Shanghai / UTC+8 while the
  extension storage bridge is loading.
• Continues through IP providers until a valid IANA timezone is found instead
  of accepting a location-only response with timezone: null.
• Adds a dedicated Regional font mask setting.
• Includes real before/after browser-side results and expanded bilingual
  documentation.

Scope and privacy

• This release changes signals visible to ordinary Chrome pages. It does not
  change Claude Code, terminal networking, OS settings, DNS, TLS, or the proxy
  itself.
• No project backend, account, telemetry, analytics, or page-content
  collection.
• It is not zero-network: automatic exit-IP matching queries only the public
  providers declared in manifest.json and documented in PRIVACY.md.
• Web Workers, special frames, and Chrome privileged pages remain outside the
  documented coverage.

Verification

• 12 automated logic tests passed.
• Synchronous timezone/font injection smoke test passed.
• JavaScript syntax checks and packaged-manifest validation passed.
• ZIP integrity is available in geomirror-v1.2.1-chrome.zip.sha256.