diff --git a/README.md b/README.md
index 12ba58d..d29093f 100644
--- a/README.md
+++ b/README.md
@@ -144,6 +144,13 @@ bird check
    - Requires Chrome to be logged into x.com
    - May prompt for keychain access on first run
 
+### Browser cookie sources (macOS)
+
+- **Chrome (default)**: reads `~/Library/Application Support/Google/Chrome/<Profile>/Cookies` (WAL/SHM copied too). Select with `--chrome-profile <name>`; defaults to `Default` or whatever you set in config.
+- **Firefox**: reads `~/Library/Application Support/Firefox/Profiles/<profile>/cookies.sqlite`. Select with `--firefox-profile <name>`; defaults to `*.default-release` if present. Use this when Chrome isn’t logged in.
+
+Precedence still holds: CLI flags > env vars > project config > global config. So a one-off `--firefox-profile default-release` overrides any config defaults.
+
 ### Posting via Sweetistics (API key)
 
 If you have a Sweetistics API key, `bird` can post through the Sweetistics SaaS instead of using local Twitter cookies:
diff --git a/docs/releasing.md b/docs/releasing.md
new file mode 100644
index 0000000..b2ce949
--- /dev/null
+++ b/docs/releasing.md
@@ -0,0 +1,56 @@
+# Releasing bird 0.1.x
+
+Target destinations:
+- npm: `@steipete/bird`
+- Homebrew: tap formula in `steipete/homebrew-tap` (e.g., `bird.rb`)
+
+## Checklist (npm + GitHub)
+1) Version bump
+   - Update `package.json` `version` (semver, e.g., `0.1.0`).
+   - Update `CHANGELOG.md` and tag the release section.
+
+2) Clean build & tests
+   - `pnpm install`
+   - `pnpm test`
+   - `pnpm run build`
+
+3) Publish to npm (scoped)
+   - Ensure you are logged in (`npm whoami`).
+   - `npm publish --access public` (from repo root). Package name is `@steipete/bird`.
+
+4) Git tag & GitHub release
+   - `git tag v0.1.0 && git push origin v0.1.0`
+   - Create GitHub release from the tag. Include changelog notes and attach optional binary (see below).
+
+## Optional: attach compiled binary
+If you want a single-file binary for Homebrew/GitHub assets:
+- Build: `pnpm run binary` (uses Bun to produce `./bird`).
+- Upload `bird` to the GitHub release and use it for the Homebrew tarball.
+
+## Homebrew tap update (steipete/homebrew-tap)
+1) Package the binary
+   - From repo root: `tar -czf bird-macos-universal-v0.1.0.tar.gz bird`
+   - Compute SHA: `shasum -a 256 bird-macos-universal-v0.1.0.tar.gz`
+
+2) Update formula in tap repo
+   - File: `homebrew-tap/bird.rb` (create if absent). Model it after `poltergeist.rb`.
+   - Fields to update:
+     - `url "https://github.com/steipete/bird/releases/download/v0.1.0/bird-macos-universal-v0.1.0.tar.gz"`
+     - `sha256 "<calculated_sha>"`
+     - `version "0.1.0"`
+   - Install block: `bin.install "bird"`
+   - `test do`: minimal `assert_match "0.1.0", shell_output("#{bin}/bird --version")`
+
+3) Push tap changes
+   - `git add bird.rb && git commit -m "bird 0.1.0" && git push`
+
+## Release order suggestion
+1) Merge to `main` and tag.
+2) Publish npm.
+3) Build binary, upload to GitHub release.
+4) Update Homebrew tap with new URL/SHA.
+
+## Notes
+- Scoped npm name (`@steipete/bird`) requires `--access public` on first publish.
+- Homebrew formula assumes macOS universal binary; adjust URL/name if you ship per-arch.
+- Config defaults (JSON5) and Firefox/Chrome cookie selection are documented in `README.md` — keep that in sync for each release.