Mimic v0.1.8 — Public Beta

Mimic v0.1.8

Changes since v0.1.7:

Browser compatibility

• Added Page-local geolocation provider overrides through Emulation.setGeolocationOverride / clearGeolocationOverride and the deprecated Page aliases. Implemented position and coordinate objects, optional altitude/heading/speed, toJSON, cache and zero-timeout behavior, live watches, cancellation, navigation persistence and Page isolation. Added geolocation permission grants/settings/reset through CDP and enforced secure origins and Permissions Policy. No operating-system GPS provider is connected. See the geolocation guide.
• Implemented legacy MouseEvent/UIEvent creation and initialization, including aliases, parameter conversion, cancellation reset and dispatch protection.
• Corrected frozen Chrome 152 platform member ordering, textarea-only textLength, and chrome.csi() document/lifecycle timing.
• Fixed internal lazy Web API loading under strict CSP and Trusted Types without granting author scripts additional eval privileges. WebGL, WebGPU and audio observations can initialize under those policies.
• Improved Canvas full-turn arcs, shadows and image blend operations, and preserved CSS fallback for :has() and style batches. Improved computed-style enumeration, shadow layout admission and related browser observations.
• Combined all Accept-CH response field lines. Fulfilled responses now update canonical cookies and Client Hints and expose actual fulfillment latency without fabricated transport timings.
• Validated restored frame bridge bindings before installation so malformed bootstrap snapshots fail cleanly and retry ordinary initialization.

Profiles, isolation and performance

• Added coherent portable BrowserContext profiles, shared validation for generated/imported profiles, and broader GPU/font recipes. Added context-isolation coverage and examples for 100 isolated cookie/profile tasks. See environment profiles.
• Bounded bootstrap memory and reduced retained state; packed DOM node storage without changing storage semantics.
• Removed a measured cross-realm DOM parent getter round trip by invoking the captured getter in its owner realm. Recorded Flickr latency measurements and remaining limitations.

Compatibility checkpoints

• Flickr Turnstile produced nonempty tokens in a diagnostic run and two clean live runs after the lazy-loading/CSP fix. The milestone tag is flickr-turnstile-pass-20260926. See the preserved comparison report.
• Google returned search HTML with nine result headings after the legacy event fix. Ten later, distinct searches succeeded sequentially in one Mimic Page/context while changing geolocation overrides; all ten JS coordinate checks matched. The milestone tags are google-serp-pass-20260926 and google-serp-geolocation-10-pass-20260926. These are observed checkpoints, not guarantees of future server acceptance or evidence that Google uses the coordinates for ranking.
• Preserved Chrome captures and used offline replay to localize execution differences. Documented controlled Chrome launch conditions and excluded instrumentation and extension-surface confounders. Private cookies, tokens, challenge bodies and credentials are not distributed.

Developer workflow

• Require focused local tests, with broad regression coverage in GitHub CI. Preserve successful Chrome 152 captures and reuse them rather than repeatedly launching the same live case.
• Keep the reviewed CDP semantic-support registry synchronized with generated runtime/documentation projections and focused test evidence. Corrected the fulfillment timing fixture to use the loader's elapsed-time clock.

Build provenance

The Windows and Linux executables are reused unchanged from the successful CI run 36223794041, source revision 6012b628ae6f3d643a0a28840ceb7f3b829d277e. The release tag adds release notes only; the manifest records binary source, packaging revision, checks and checksums separately. The binary's development-version banner identifies its actual source revision.

Mimic remains a renderer-free public beta for Windows and Linux amd64. See the compatibility boundaries. Full source changes: v0.1.7...v0.1.8.