toolbox_component_error_telemetry_summary_06_07_2026.md

DevTools Toolbox Error Analysis - Component (React) Errors

Period: 2026-06-23 12:22 to 2026-07-05 23:22 Total Errors: 318

Overview

The analysis reveals 318 component (React) errors, with the most common error being 'TypeError' (63.2%). 91.5% occur on release. Windows users account for 70.1% of all errors.

Platform Distribution

• Windows: 223 errors (70.1%)
• Darwin: 57 errors (17.9%)
• Linux: 38 errors (11.9%)

Channel Distribution

• release: 291 errors (91.5%)
• aurora: 13 errors (4.1%)
• default: 10 errors (3.1%)
• beta: 2 errors (0.6%)
• nightly: 2 errors (0.6%)

Error Breakdown by Category

1. TypeError in ConsoleSettings - 113 errors (35.5%)

Component:

• Primary: ConsoleSettings

Error location:

get doc@resource://devtools/client/framework/toolbox.js:616:5

Affected:

• Channels: release (113)
• Platforms: Windows (95), Linux (16), Darwin (2)

2. TypeError in HTMLPreview - 27 errors (8.5%)

Component:

• Primary: HTMLPreview

Error location:

maybeCancelContentJSExecution@resource://gre/modules/RemoteWebNavigation.sys.mjs:41:5

Affected:

• Channels: release (24), aurora (3)
• Platforms: Darwin (16), Windows (11)

3. undefined in RequestListContentComponent - 15 errors (4.7%)

Component:

• Primary: RequestListContentComponent

Affected:

• Channels: release (15)
• Platforms: Windows (11), Darwin (2), Linux (2)

4. undefined in JSTerm - 12 errors (3.8%)

Component:

• Primary: JSTerm

Affected:

• Channels: release (12)
• Platforms: Windows (12)

5. InternalError in ResponsePanel - 11 errors (3.5%)

Component:

• Primary: ResponsePanel

Error location:

parseJSON@resource://devtools/client/netmonitor/src/utils/request-utils.js:719:51

Affected:

• Channels: release (10), aurora (1)
• Platforms: Windows (6), Darwin (5)

6. NS_ERROR_MALFORMED_URI in HTMLPreview - 11 errors (3.5%)

Component:

• Primary: HTMLPreview

Error location:

#updatePreview@resource://devtools/client/netmonitor/src/components/previews/HtmlPreview.js:61:29

Affected:

• Channels: release (11)
• Platforms: Windows (6), Linux (5)

7. TypeError in MenuButton - 9 errors (2.8%)

Component:

• Primary: MenuButton

Error location:

UNSAFE_componentWillReceiveProps@resource://devtools/client/shared/components/menu/MenuButton.js:135:17

Affected:

• Channels: release (7), aurora (2)
• Platforms: Windows (5), Darwin (2), Linux (2)

8. TypeError in ToolboxToolbar - 8 errors (2.5%)

Component:

• Primary: ToolboxToolbar

Error location:

render@resource://devtools/client/framework/components/ToolboxToolbar.js:548:32

Affected:

• Channels: release (8)
• Platforms: Darwin (4), Linux (4)

9. undefined in Connect(MonitorPanel) - 7 errors (2.2%)

Component:

• Primary: Connect(MonitorPanel)

Affected:

• Channels: release (7)
• Platforms: Windows (6), Darwin (1)

10. TypeError in RequestListColumnWaterfall - 5 errors (1.6%)

Component:

• Primary: RequestListColumnWaterfall

Error location:

requestData@resource://devtools/client/netmonitor/src/connector/index.js:531:5

Affected:

• Channels: release (5)
• Platforms: Windows (4), Darwin (1)

Top Error Types Summary

1. TypeError in ConsoleSettings - 113 occurrences (35.5%)
2. TypeError in HTMLPreview - 27 occurrences (8.5%)
3. undefined in RequestListContentComponent - 15 occurrences (4.7%)
4. undefined in JSTerm - 12 occurrences (3.8%)
5. InternalError in ResponsePanel - 11 occurrences (3.5%)
6. NS_ERROR_MALFORMED_URI in HTMLPreview - 11 occurrences (3.5%)
7. TypeError in MenuButton - 9 occurrences (2.8%)
8. TypeError in ToolboxToolbar - 8 occurrences (2.5%)
9. undefined in Connect(MonitorPanel) - 7 occurrences (2.2%)
10. TypeError in RequestListColumnWaterfall - 5 occurrences (1.6%)

Actionable Insights

• 1. TypeError in ConsoleSettings accounts for 35.5% of all errors (113 occurrences)
• 2. release channel dominance: 91.5% of errors are from release
• 3. Platform-specific: TypeError in ConsoleSettings is predominantly on Windows (95/113 errors)

Recommendations

Priority 1: TypeError in ConsoleSettings

• File location: devtools/client/framework/toolbox.js:616:5
• Impact: 35.5% of all errors

Priority 2: TypeError in HTMLPreview

• File location: gre/modules/RemoteWebNavigation.sys.mjs:41:5
• Impact: 8.5% of all errors

Priority 3: undefined in RequestListContentComponent

• Impact: 4.7% of all errors

Priority 4: undefined in JSTerm

• Impact: 3.8% of all errors

Priority 5: InternalError in ResponsePanel

• File location: devtools/client/netmonitor/src/utils/request-utils.js:719:51
• Impact: 3.5% of all errors

---

DevTools Toolbox Component (React) Errors (7-day analysis)

318 errors recorded from 2026-06-23 12:22 to 2026-07-05 23:22. Top issues: TypeError in ConsoleSettings (113 errors), TypeError in HTMLPreview (27 errors), undefined in RequestListContentComponent (15 errors). release channel represents 91.5% of errors. Windows accounts for 70.1% of errors.