> ## Documentation Index
> Fetch the complete documentation index at: https://docs.browspark.krishm.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Capability matrix

> Which DevTools Protocol domains work in extension mode versus developer mode, probed live.

Probed live by `bun run capabilities` on 2026-09-11.

* Extension mode: Mozilla/5.0 (Macintosh; Intel Mac OS X 10\_15\_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36 via chrome.debugger (extension v0.1.0)
* Developer mode: Chrome/152.0.7977.83 via direct CDP

| CDP domain    | Extension mode                                            | Developer mode |
| ------------- | --------------------------------------------------------- | -------------- |
| Runtime       | ✅                                                         | ✅              |
| Log           | ✅                                                         | ✅              |
| Network       | ✅                                                         | ✅              |
| Page          | ✅                                                         | ✅              |
| DOM           | ✅                                                         | ✅              |
| CSS           | ✅                                                         | ✅              |
| Debugger      | ✅                                                         | ✅              |
| DOMDebugger   | ✅                                                         | ✅              |
| Input         | ✅                                                         | ✅              |
| Emulation     | ✅                                                         | ✅              |
| Fetch         | ✅                                                         | ✅              |
| Overlay       | ✅                                                         | ✅              |
| Accessibility | ✅                                                         | ✅              |
| Audits        | ✅                                                         | ✅              |
| Security      | ❌ code:-32601,message:'Security.enable' wasn't found      | ✅              |
| Profiler      | ✅                                                         | ✅              |
| HeapProfiler  | ❌ code:-32601,message:'HeapProfiler.enable' wasn't found  | ✅              |
| Tracing       | ✅                                                         | ✅              |
| Performance   | ✅                                                         | ✅              |
| Storage       | ✅                                                         | ✅              |
| DOMStorage    | ❌ code:-32601,message:'DOMStorage.enable' wasn't found    | ✅              |
| IndexedDB     | ❌ code:-32601,message:'IndexedDB.enable' wasn't found     | ✅              |
| CacheStorage  | ✅                                                         | ✅              |
| ServiceWorker | ❌ code:-32601,message:'ServiceWorker.enable' wasn't found | ✅              |
| Animation     | ❌ code:-32601,message:'Animation.enable' wasn't found     | ✅              |
| Media         | ❌ code:-32601,message:'Media.enable' wasn't found         | ✅              |
| WebAudio      | ✅                                                         | ✅              |
| WebAuthn      | ✅                                                         | ✅              |
| Target        | ❌ code:-32000,message:Not allowed                         | ✅              |
| Browser       | ❌ code:-32601,message:'Browser.getVersion' wasn't found   | ✅              |

## What that means for the tools

| Tool                                                                                                                | Extension mode                                                                                                | Developer mode |
| ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- | -------------- |
| browser\_\* automation                                                                                              | ✅ shared tabs only                                                                                            | ✅ every tab    |
| devtools\_console, devtools\_evaluate, devtools\_network, devtools\_sources, devtools\_debugger, devtools\_elements | ✅                                                                                                             | ✅              |
| devtools\_storage                                                                                                   | ✅ cookies via CDP, web storage via page JavaScript                                                            | ✅              |
| devtools\_workers                                                                                                   | ⚠️ registrations via the page; update/unregister via the page; skipWaiting/start/evaluate need developer mode | ✅              |
| devtools\_performance (tracing)                                                                                     | ✅                                                                                                             | ✅              |
| devtools\_profile (CPU)                                                                                             | ✅                                                                                                             | ✅              |
| devtools\_memory (heap)                                                                                             | ❌ HeapProfiler not exposed to extensions                                                                      | ✅              |
| devtools\_coverage                                                                                                  | ✅                                                                                                             | ✅              |
| devtools\_emulation                                                                                                 | ✅                                                                                                             | ✅              |
| devtools\_accessibility, devtools\_security                                                                         | ✅                                                                                                             | ✅              |
| devtools\_lighthouse                                                                                                | ❌ developer mode only                                                                                         | ✅              |
| devtools\_cdp (raw commands)                                                                                        | ❌ developer mode only                                                                                         | ✅              |
| Browser-wide operations (Target, Browser, Storage domains)                                                          | ❌ not exposed to extensions                                                                                   | ✅              |