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fix: remove flags blocking enterprise extension loading #133

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Merged
rgarcia merged 8 commits into from
Jan 27, 2026
+799 −50
Merged

fix: remove flags blocking enterprise extension loading #133

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1944f9d
fix: remove --disable-background-networking to enable enterprise exte…
rgarcia Jan 26, 2026
3f5b01b
chore: update vendored web-bot-auth extension
rgarcia Jan 26, 2026
4d56dbb
fix: remove --disable-extensions-except to allow enterprise policy ex…
rgarcia Jan 26, 2026
9d70ef7
refactor: use minimal enterprise test extension
rgarcia Jan 26, 2026
6594b13
chore: remove private_key.pem and add .gitignore
rgarcia Jan 26, 2026
077b62c
chore: add back private_key.pem for future extension updates
rgarcia Jan 26, 2026
9f66c28
chore: add pack.sh script for regenerating extension.crx
rgarcia Jan 26, 2026
1472fd8
fix: stop emitting --disable-extensions-except flag
rgarcia Jan 27, 2026
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4 changes: 3 additions & 1 deletion images/chromium-headless/image/wrapper.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -44,13 +44,15 @@ fi
export HOSTNAME="${HOSTNAME:-kernel-vm}"

# if CHROMIUM_FLAGS is not set, default to the flags used in playwright_stealth
# NOTE: --disable-background-networking was intentionally removed because it prevents
# Chrome from fetching extensions via ExtensionInstallForcelist enterprise policy.
# Enterprise extensions require Chrome to make HTTP requests to fetch update.xml and .crx files.
if [ -z "${CHROMIUM_FLAGS:-}" ]; then
CHROMIUM_FLAGS="--accept-lang=en-US,en \
--allow-pre-commit-input \
--blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4 \
--crash-dumps-dir=/tmp/chromium-dumps \
--disable-back-forward-cache \
--disable-background-networking \
--disable-background-timer-throttling \
--disable-backgrounding-occluded-windows \
--disable-blink-features=AutomationControlled \
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6 changes: 5 additions & 1 deletion server/cmd/api/api/chromium.go
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Expand Up @@ -260,10 +260,14 @@ func (s *ApiService) UploadExtensionsAndRestart(ctx context.Context, request oap

// Build flags overlay file in /chromium/flags, merging with existing flags
// Only add --load-extension flags for extensions that don't use policy installation
// NOTE: We intentionally do NOT use --disable-extensions-except here because it causes
// Chrome to disable external providers (including the policy loader), which prevents
// enterprise policy extensions (ExtensionInstallForcelist) from being fetched and installed.
// See Chromium source: extension_service.cc - external providers are only created when
// extensions_enabled() returns true, which is false when --disable-extensions-except is used.
var newTokens []string
if len(pathsNeedingFlags) > 0 {
newTokens = []string{
fmt.Sprintf("--disable-extensions-except=%s", strings.Join(pathsNeedingFlags, ",")),
fmt.Sprintf("--load-extension=%s", strings.Join(pathsNeedingFlags, ",")),
}
}
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