adaptive-multi-protocol-browser/docs/browser-builds.md

Browser Builds

Status: draft | Updated 2026-07-07 | Applies to: AMPB desktop and mobile builders

AMPB browser builds must keep source checkouts, object directories, toolchain caches, and temporary artifacts outside this repository. The default local workspace is /tmp/ampb-browser-build.

Runtime Targets

• Desktop: bundled Firefox/Gecko-lineage AMPB app.
• Android: bundled GeckoView/Fenix/Tor Browser Android-lineage AMPB app.
• iOS: AMPB-owned iOS shell with platform WebKit constraints and embedded transports.
• Tor hardening: track Tor Browser behavior before claiming Tor Browser equivalence.

Workspace

Create a local build workspace:

sh tools/browser-build-workspace.sh

Override the root when needed:

AMPB_BROWSER_BUILD_ROOT=/tmp/ampb-browser-build sh tools/browser-build-workspace.sh

The script creates:

• /tmp/ampb-browser-build/src
• /tmp/ampb-browser-build/obj
• /tmp/ampb-browser-build/cache
• /tmp/ampb-browser-build/artifacts
• /tmp/ampb-browser-build/logs

Desktop Build Probe

Desktop is the first browser proof. The probe uses the current Gecko checkout and writes its mozconfig, object directory, caches, and logs under /tmp.

Print the desktop build entrypoint help:

sh tools/browser-desktop-build-probe.sh

Run the first desktop configure probe:

AMPB_DESKTOP_BUILD_PROBE_MODE=configure sh tools/browser-desktop-build-probe.sh

Run the first desktop source build:

AMPB_DESKTOP_BUILD_PROBE_MODE=build sh tools/browser-desktop-build-probe.sh

The default source flavor is the verified desktop path. Use AMPB_DESKTOP_BUILD_FLAVOR=artifact only as a faster optional probe; it depends on Mozilla artifact availability for the selected checkout.

The probe writes:

• /tmp/ampb-browser-build/mozconfigs/desktop-source.mozconfig
• /tmp/ampb-browser-build/obj/gecko-desktop-source
• /tmp/ampb-browser-build/logs/gecko-desktop-source-mach-help.log
• /tmp/ampb-browser-build/logs/gecko-desktop-source-mach-configure.log
• /tmp/ampb-browser-build/logs/gecko-desktop-source-mach-build.log

A successful source build produces a bundled app at /tmp/ampb-browser-build/obj/gecko-desktop-source/dist/Nightly.app.

Configure and build modes may install Mozilla build Python helpers such as zstandard into mach virtualenvs under /tmp/ampb-browser-build/cache/mozbuild.

Tor Provider Probe

Build a local Arti provider for managed Tor startup:

sh tools/browser-tor-provider-build.sh

The provider script keeps Cargo output and the installed Arti binary under the external workspace:

• /tmp/ampb-browser-build/providers/arti/bin/arti
• /tmp/ampb-browser-build/logs/arti-cargo-install.log

ampbrowser open <onion-url> --yes --launch will prefer this local Arti provider, then AMPB_ARTI_BIN, AMPB_TOR_BIN, configured transports.tor.binary_path, and finally a system tor binary if one is present.

I2P Provider Probe

Managed I2P startup currently targets i2pd. AMPB adopts an existing HTTP proxy on 127.0.0.1:4444 when available; otherwise ampbrowser open <i2p-url> --yes --launch uses AMPB_I2PD_BIN, configured transports.i2p.binary_path, or a system i2pd binary. The AMPB-owned process writes config, router data, logs, and ownership metadata under .ampb/transports/i2p.

Source Plan

Print the canonical source targets and paths:

sh tools/browser-source-plan.sh

Clone or refresh the source trees under /tmp:

sh tools/browser-source-sync.sh

Report checked-out source revisions:

sh tools/browser-source-report.sh

Defaults:

• Current Gecko / Firefox Android source: https://github.com/mozilla/gecko-dev.git
• Tor Browser build recipes: https://gitlab.torproject.org/tpo/applications/tor-browser-build.git
• Legacy archived Android layout reference: https://github.com/mozilla-mobile/firefox-android.git

Override repositories for experiments without editing the repo:

AMPB_GECKO_REPO=https://github.com/mozilla/gecko-dev.git sh tools/browser-source-sync.sh

The legacy Firefox Android repository is archived and should not be treated as the current source of truth. Clone it only when comparing older fenix, focus-android, or android-components layout:

AMPB_INCLUDE_LEGACY_FIREFOX_ANDROID=1 sh tools/browser-source-sync.sh

Android Build Probe

Android remains a first-class target, but it follows the desktop proof. Run the first Android build-discovery command from the /tmp checkout while keeping Gradle, pip, Python bytecode, and Mozilla build state in /tmp:

sh tools/browser-android-build-probe.sh

The probe writes its log to /tmp/ampb-browser-build/logs/gecko-android-mach-probe.log.

This first probe intentionally asks mach for Android build help instead of compiling the world. It verifies that the current Gecko checkout, mach, Python virtualenv state, and Android build command entry point can initialize from /tmp before a longer bootstrap or compile run.

Repo Rule

Keep only repeatable scripts, clean docs, and small AMPB source changes in this repo. Do not commit Firefox source trees, GeckoView checkouts, Tor Browser build trees, browser object directories, SDK downloads, signing material, generated profiles, release artifacts, or machine-local notes.

Rebuild Notes

Public rebuild docs should be general and credential-free. Private signing, release, account, and machine inventory notes belong outside public docs.