ungoogled-chromium: Ungoogled Chromium doesn't try to install ExtensionInstallForceList

OS/Platform

Arch Linux

Installed

https://ungoogled-software.github.io/ungoogled-chromium-binaries/

Version

Version 117.0.5938.88 (Official Build, ungoogled-chromium) Arch Linux (64-bit)

Have you tested that this is not an upstream issue or an issue with your configuration?

• I have tried reproducing this issue in Chrome and it could not be reproduced there
• I have tried reproducing this issue in vanilla Chromium and it could not be reproduced there
• I have tried reproducing this issue in ungoogled-chromium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there

Description

Ungoogled Chromium doesn’t install the extensions from the managed policy ExtensionInstallForceList

How to Reproduce?

1. Install the following managed policy

{
  "ExtensionInstallForcelist": [
    "cjpalhdlnbpafiamejdnhcphjbkeiagm;http://clients2.google.com/service/update2/crx?response=updatecheck&x=id%3Dcjpalhdlnbpafiamejdnhcphjbkeiagm"
  ]
}

• For Ungoogled Chromium on Archlinux /etc/chromium/policies/managed/policy.json
• For Google Chrome on Archlinux /etc/opt/chrome/policies/managed/policy.json (to compare)

1. Start UG/Chrome with an empty profile.

Actual behaviour

Ungoogled Chromium won’t show any extension in about://extensions and searching the chrome_debug.log for the extension id or Forced extension (in case of failure) won’t return anything.

Expected behaviour

Google Chrome actually shows a policy managed extension And searching in the chrome_debug.log for the extension id returns multiple lines.

Relevant log output

// Sample case of failure for Chromium Web Store
[153207:153207:0924/012949.495575:WARNING:load_error_reporter.cc(74)] Extension error: Expected version "1.5.3", but version was "1.5.3.1"
[153207:153207:0924/012949.495619:WARNING:force_installed_metrics.cc(481)] Failed to install 1 forced extensions.
[153207:153207:0924/012949.495637:WARNING:force_installed_metrics.cc(518)] Forced extension ocaahdebbfolfmndjeplogmgcagdmblk failed to install with data=failure_reason: 20; install_error_detail: 4; install_stage: 4; downloading_cache_status: 2

// Sample case of success for uBlock Origin
[153207:153247:0924/012948.403527:VERBOSE1:content_verifier.cc(630)] OnFetchComplete cjpalhdlnbpafiamejdnhcphjbkeiagm success:1
[153364:1:0924/012948.513346:VERBOSE1:script_context.cc(143)] Created context:
  extension id:           cjpalhdlnbpafiamejdnhcphjbkeiagm
  frame:                  0x3aaf001edda0
  URL:                    
  context_type:           BLESSED_EXTENSION
  effective extension id: cjpalhdlnbpafiamejdnhcphjbkeiagm
  effective context type: BLESSED_EXTENSION

Additional context

Relevant documentation :

• https://chromeenterprise.google/policies/#ExtensionInstallForcelist
• https://serverfault.com/a/354635

For extensions in the Chrome Extension Store, the update URL part is optional, I added the explicit manifest URL because I figured Ungoogled Chromium domains nullification would cause issues.