firefox-extension-amber

maintainer paysonwallach · 1 votes · scanned 2026-08-03 00:08:14.047287

MEDIUM

Why flagged The .xpi (Firefox extension) is downloaded from a personal domain (paysonwallach.com) rather than from the official Mozilla AMO store or the project's GitHub releases. While a sha256sum is present (providing integrity checking against tampering in transit), the source is still a personal host controlled solely by the maintainer, meaning the binary could be silently replaced at any time without a corresponding PKGBUILD update. An .xpi is executed code (JavaScript running in the browser with extension privileges), so a compromised or swapped file would represent a real supply-chain risk. The sha256sum mitigates MITM but not a deliberate host-side substitution paired with a PKGBUILD update. This is a genuine medium-risk pattern: executed code from an unofficial/personal host.

Triggered rules

MEDIUM source=() URL on a non-standard host source_untrusted_domain

One or more source=() URLs point to a host outside the trusted allowlist (github.com, gitlab.com, codeberg.org, pypi.org, …).

PKGBUILD:10 source=("https://paysonwallach.com/amber/amber-${pkgver}.xpi")

MEDIUM AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 72%): The .xpi (Firefox extension) is downloaded from a personal domain (paysonwallach.com) rather than from the official Mozilla AMO store or the project's GitHub releases. While a sha256sum is present (providing integrity checking against tampering in transit), the source is still a personal host controlled solely by the maintainer, meaning the binary could be silently replaced at any time without a corresponding PKGBUILD update. An .xpi is executed code (JavaScript running in the browser with extension privileges), so a compromised or swapped file would represent a real supply-chain risk. The sha256sum mitigates MITM but not a deliberate host-side substitution paired with a PKGBUILD update. This is a genuine medium-risk pattern: executed code from an unofficial/personal host.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Payson Wallach <payson@paysonwallach.com>
    
      2
    
      3pkgname=firefox-extension-amber
    
      4pkgver=1.21
    
      5pkgrel=1
    
      6pkgdesc='Bring the Unix philosophy to the browser.'
    
      7arch=(x86_64)
    
      8url="https://github.com/paysonwallach/amber-web-extension/"
    
      9license=('GPL')
    
      10source=("https://paysonwallach.com/amber/amber-${pkgver}.xpi")
    
      11noextract=("amber-${pkgver}.xpi")
    
      12sha256sums=('6a05282b2a7b71edc0cc8f3f6e7eb9af2b7cd29a0639e57812c6eadaf8b43330')
    
      13
    
      14package() {
    
      15	depends=('firefox')
    
      16
    
      17	_extension_id='amber@paysonwallach.com'
    
      18	_extension_dest="${pkgdir}/usr/lib/firefox/browser/extensions/${_extension_id}"
    
      19	install -Dm644 "${srcdir}/amber-${pkgver}.xpi" "${_extension_dest}.xpi"
    
      20}
    
      21

Scan history

Scanned at (UTC)	Severity	Rules
2026-08-03 00:08:14	MEDIUM	2
2026-08-02 00:16:08	MEDIUM	2
2026-08-01 00:11:18	MEDIUM	2
2026-07-31 00:14:10	MEDIUM	2
2026-07-30 00:17:23	MEDIUM	2
2026-07-29 00:25:53	MEDIUM	2
2026-07-28 00:07:28	MEDIUM	2
2026-07-27 00:24:32	MEDIUM	2
2026-07-26 00:07:32	MEDIUM	2
2026-07-25 00:13:44	MEDIUM	2
2026-07-24 00:02:28	MEDIUM	2
2026-07-23 00:14:47	MEDIUM	2
2026-07-22 00:29:32	MEDIUM	2
2026-07-21 00:24:15	MEDIUM	2
2026-07-20 00:19:49	MEDIUM	2
2026-07-19 00:17:08	MEDIUM	2
2026-07-18 00:14:48	MEDIUM	2
2026-07-17 00:06:16	MEDIUM	2
2026-07-16 00:05:41	MEDIUM	2
2026-07-15 00:09:25	MEDIUM	2