added scope for browser session pull task and cleanup

pm/tasks.org

@@ -254,6 +254,28 @@
 - commit: `c0054dc` on branch `cx`
 - tests: `./venv/bin/python -m unittest discover -s tests`; `./venv/bin/python scrape_costco.py --help`; verified Costco summary/detail flattening now uses composite receipt keys in unit tests
 - date: 2026-03-16
+* [ ] t1.8.6: add browser session helper (2-4 commits)
+
+** acceptance criteria
+- create a separate Python module/script that extracts firefox browser session data needed for giant and costco scrapers.
+- support Firefox and Costco first, including:
+  - loading cookies via existing browser-cookie approach
+  - reading browser storage needed for dynamic auth headers (e.g. Costco bearer token)
+  - copying locked browser sqlite/db files to a temp location before reading when necessary
+- expose a small interface usable by scrapers, e.g. cookie jar + storage/header values
+- keep retailer-specific parsing of extracted session data outside the low-level browser access layer
+- structure the helper so Chromium-family browser support can be added later without changing scraper call sites
+
+** notes
+- goal is to replace manual `.env` copying of volatile browser-derived auth data
+- session bootstrap only, not full browser automation
+- prefer one shared helper over retailer-specific ad hoc storage reads
+- Firefox only; Chromium support later
+
+** evidence
+- commit:
+- tests:
+- date:
 * [ ] t1.9: compute normalized comparison metrics (2-4 commits)
 
 ** acceptance criteria