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feat: persistent profile dir + C7 closure (firefox-5 / 0.1.6)

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- Add profile_dir= kwarg to InvisiblePlaywright (sync + async).
  Maps to firefox.launch_persistent_context(); returns a BrowserContext.
  Cookies / localStorage / extensions / cache / prefs all persisted.

- Drop the firefox-4 era workaround that filtered locale + timezone_id
  out of the persistent kwargs.  firefox-5 ships the C++
  docShell.overrideTimezone IDL method (50 LOC patch in
  docshell/base/nsIDocShell.idl + nsDocShell.cpp, see patch.md
  section 19 in feder-cr/invisible-firefox), so per-realm overrides
  land without crashing the launch handshake.

- Bump BINARY_VERSION firefox-4 -> firefox-5.

- Sentinel unit tests added: persistent kwargs MUST include locale +
  timezone_id (defends against re-introducing the workaround) and
  must NOT include timezone_id when timezone="" is the "host TZ" sentinel.

Validation: smoke test against the local firefox-5 build, persistent
context UP in 21s (was 180s timeout), Intl.timeZone == Europe/London,
hardwareConcurrency / screen / DPR / locale all reflect the PIN.
This commit is contained in:
feder-cr
2026-05-21 12:19:38 -07:00
parent acd568f5d3
commit 22b1171518
6 changed files with 313 additions and 6 deletions
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CHANGELOG.md
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@@ -6,6 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
## [Unreleased]
## [0.1.6] - 2026-05-21
### Added
- `profile_dir=` kwarg on `InvisiblePlaywright` (sync + async). When set, the session uses `firefox.launch_persistent_context()` so cookies, localStorage, sessionStorage, extensions, cache and prefs are kept on disk between runs. `__enter__` returns a `BrowserContext` directly: `with InvisiblePlaywright(profile_dir=p) as ctx: ctx.new_page()`. Pair with a stable `seed=` to also pin the fingerprint identity across runs. First run creates the dir; subsequent runs reuse it.
### Fixed
- `launch_persistent_context(timezone_id="…")` no longer times out at 180s. Root cause: `juggler/content/main.js` calls `docShell.overrideTimezone(...)` on every navigation; the patched Firefox up to firefox-4 didn't expose that IDL method on `nsIDocShell`, so the call threw `TypeError: docShell.overrideTimezone is not a function`. On the non-persistent path the error fired *after* launch and was harmless; on the persistent path it blocked the launch handshake. `firefox-5` ships the C++ method (see `patch.md` section 19); this release removes the firefox-4 era Python workaround that was filtering `locale`/`timezone_id` out of the persistent context kwargs.
### Changed
- `BINARY_VERSION` bumped from `firefox-4` to `firefox-5`. The Python source delta is JS/Python only; the new Firefox build adds 50 lines of C++ in `docshell/base/nsIDocShell.idl` + `nsDocShell.cpp`.
## [0.1.5] - 2026-05-20
### Fixed