toolbox_server_error_telemetry_summary_25_05_2026.md

DevTools Toolbox Error Analysis - Server Protocol Errors

Period: 2026-04-08 10:00 to 2026-05-24 23:54 Total Errors: 4134

Overview

The analysis reveals 4134 server protocol errors, with the most common error type being 'SecurityError @ document-events.js' (22.0%). 96.4% occur on release. Windows users account for 79.6% of all errors.

Platform Distribution

• Windows: 3292 errors (79.6%)
• Linux: 512 errors (12.4%)
• Darwin: 330 errors (8.0%)

Channel Distribution

• release: 3984 errors (96.4%)
• aurora: 123 errors (3.0%)
• nightly: 10 errors (0.2%)
• default: 9 errors (0.2%)
• beta: 4 errors (0.1%)
• unknown: 3 errors (0.1%)
• ****: 1 errors (0.0%)

Error Breakdown by Category

1. Error @ async-storage.js: Error: (undefined) - 832 errors (20.1%)

Error location:

getItemOnError@resource://devtools/shared/async-storage.js:100:13

Affected:

• Channels: release (809), aurora (19), unknown (2), beta (1), nightly (1)
• Platforms: Windows (781), Linux (41), Darwin (10)
• Targets: undefined (832)

2. TypeError @ toolbox.js: TypeError: (undefined) - 806 errors (19.5%)

Error location:

_getDebugTargetData@resource://devtools/client/framework/toolbox.js:1486:17

Affected:

• Channels: release (800), default (2), aurora (2), unknown (1), (1)
• Platforms: Windows (693), Linux (65), Darwin (48)
• Targets: undefined (806)

3. SecurityError @ document-events.js: Error: (watchResources) - 567 errors (13.7%)

Error location:

listen@resource://devtools/server/actors/webconsole/listeners/document-events.js:66:11

Affected:

• Channels: release (565), aurora (2)
• Platforms: Windows (403), Linux (97), Darwin (67)
• Targets: server0.conn0.watcher3 (443), server0.conn1.watcher3 (35), server0.conn2.watcher3 (30)

4. TypeError @ WeakMapMap.js: TypeError: (undefined) - 407 errors (9.8%)

Error location:

set@resource://devtools/client/shared/WeakMapMap.js:73:18

Affected:

• Channels: release (360), aurora (41), nightly (5), beta (1)
• Platforms: Windows (374), Linux (18), Darwin (15)
• Targets: undefined (407)

5. SecurityError @ document-events.js: Error: (watchResources) - 342 errors (8.3%)

Error location:

onWindowReady@resource://devtools/server/actors/webconsole/listeners/document-events.js:113:9

Affected:

• Channels: release (320), aurora (20), nightly (2)
• Platforms: Windows (295), Darwin (29), Linux (18)
• Targets: server0.conn0.watcher3 (281), server0.conn1.watcher3 (21), server0.conn4.watcher3 (8)

6. out of memory @ unknown: Error: (watchTargets) - 340 errors (8.2%)

Error location:

onPacket/<@resource://devtools/shared/protocol/Front.js:404:31

Affected:

• Channels: release (334), aurora (6)
• Platforms: Windows (214), Darwin (73), Linux (53)
• Targets: server0.conn0.watcher3 (243), server0.conn1.watcher3 (22), server0.conn2.watcher3 (19)

7. TypeError @ panel.js: TypeError: (undefined) - 131 errors (3.2%)

Error location:

focusInput@resource://devtools/client/webconsole/panel.js:33:5

Affected:

• Channels: release (131)
• Platforms: Linux (127), Windows (4)
• Targets: undefined (131)

8. SecurityError @ console-messages.js: Error: (watchResources) - 87 errors (2.1%)

Error location:

watch@resource://devtools/server/actors/resources/console-messages.js:93:7

Affected:

• Channels: release (86), default (1)
• Platforms: Windows (57), Linux (17), Darwin (13)
• Targets: server0.conn0.watcher3 (73), server0.conn1.watcher3 (5), server0.conn6.watcher3 (1)

9. TypeError @ console-messages.js: Error: (watchResources) - 87 errors (2.1%)

Error location:

watch@resource://devtools/server/actors/resources/console-messages.js:93:7

Affected:

• Channels: release (87)
• Platforms: Windows (73), Linux (9), Darwin (5)
• Targets: server0.conn0.watcher3 (83), server0.conn36.watcher3 (1), server0.conn6.watcher3 (1)

10. InvalidStateError @ unknown: Error: (watchTargets) - 69 errors (1.7%)

Error location:

onNewTargetActor@resource://devtools/server/connectors/js-process-actor/ContentProcessWatcherRegistry.sys.mjs:252:38

Affected:

• Channels: release (67), aurora (2)
• Platforms: Windows (47), Darwin (12), Linux (10)
• Targets: server0.conn0.watcher3 (67), server0.conn2.watcher3 (1), server0.conn1.watcher3 (1)

Top Error Types Summary

1. Error @ async-storage.js: getItemOnError - 832 occurrences (20.1%)
2. TypeError @ toolbox.js: _getDebugTargetData - 806 occurrences (19.5%)
3. SecurityError @ document-events.js: listen - 567 occurrences (13.7%)
4. TypeError @ WeakMapMap.js: set - 407 occurrences (9.8%)
5. SecurityError @ document-events.js: onWindowReady - 342 occurrences (8.3%)
6. out of memory @ unknown: onPacket/< - 340 occurrences (8.2%)
7. TypeError @ panel.js: focusInput - 131 occurrences (3.2%)
8. SecurityError @ console-messages.js: watch - 87 occurrences (2.1%)
9. TypeError @ console-messages.js: watch - 87 occurrences (2.1%)
10. InvalidStateError @ unknown: onNewTargetActor - 69 occurrences (1.7%)

Actionable Insights

• 1. Error @ async-storage.js: getItemOnError accounts for 20.1% of all errors (832 occurrences)
• 2. release channel dominance: 96.4% of errors are from release
• 3. Platform-specific: Error @ async-storage.js: getItemOnError is predominantly on Windows (781/832 errors)

Recommendations

Priority 1: Error @ async-storage.js: getItemOnError

• File location: devtools/shared/async-storage.js:100:13
• Impact: 20.1% of all errors

Priority 2: TypeError @ toolbox.js: _getDebugTargetData

• File location: devtools/client/framework/toolbox.js:1486:17
• Impact: 19.5% of all errors

Priority 3: SecurityError @ document-events.js: listen

• File location: devtools/server/actors/webconsole/listeners/document-events.js:66:11
• Impact: 13.7% of all errors

Priority 4: TypeError @ WeakMapMap.js: set

• File location: devtools/client/shared/WeakMapMap.js:73:18
• Impact: 9.8% of all errors

Priority 5: SecurityError @ document-events.js: onWindowReady

• File location: devtools/server/actors/webconsole/listeners/document-events.js:113:9
• Impact: 8.3% of all errors

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DevTools Toolbox Server Protocol Errors (7-day analysis)

4134 errors recorded from 2026-04-08 10:00 to 2026-05-24 23:54. Top issues: Error @ async-storage.js: getItemOnError (832 errors), TypeError @ toolbox.js: _getDebugTargetData (806 errors), SecurityError @ document-events.js: listen (567 errors). release channel represents 96.4% of errors. Windows accounts for 79.6% of errors.