DSH plugin browser control: dsh-browser setup and safety

dsh-browser is the browser-control DSH plugin that makes DeepSeek Harness drive a real browser to perform actions: open pages, scrape content, simulate clicks and typing, and take screenshots (source). It is not the same thing as web search — search only fetches content, whereas browser control genuinely operates a page. This guide covers what it can do, how to install and configure it, and its permission and safety boundaries.

What the browser control DSH plugin does: open, scrape, interact, screenshot

A browser control plugin gives DeepSeek Harness the ability to actually open a page and operate it, rather than just fetching its content back. In the official tools subsystem, tools are registered into a registry by plugins and dispatched by the tool pipeline inside the loop (source), and a browser control plugin registers browser actions as tools. Its core abilities split into four kinds:

1. Open a page — load a given URL and wait for it to finish loading. Expected: you get an interactive page context.
2. Scrape content — extract body text, links, or structured data. Expected: the page becomes usable material.
3. Simulate interaction — click, type, select, paginate, submit forms. Expected: tasks that need multiple steps get completed.
4. Screenshot — save a visual snapshot of the page or a region. Expected: you have evidence or a visual reference.

The most intuitive difference from web search: a search plugin answers "what does this page say", while browser control answers "click it for me".

Install and configure a DSH plugin for browser control: deps and profile

Install a browser control plugin with the standard dsh plugin --profile web add, but it has one extra step over most plugins: preparing the browser runtime dependency. If the dependency is missing, the usual outcome is "plugin present, page will not open". Follow these steps:

1. Install the plugin — run in your terminal:
   bash

   dsh plugin --profile web add @caob23/dsh-browser-control
   

   Expected: the terminal echoes that the plugin joined the web profile.
2. Prepare the browser dependency — install or point to the browser engine it needs, per the plugin's docs. Expected: the plugin can find a usable browser instance.
3. Restart and verify — restart DeepSeek Harness and have it open a simple page. Expected: it returns page content, proving the chain works.
4. Switch to a real task — have it complete a multi-step operation, such as filling in a test form. Expected: clicks and typing happen in order.
5. Reclaim permissions — switch back to a restricted profile when the task ends. Expected: the hands-on capability is withdrawn, lowering risk.

To find similar implementations, search the browser keyword on DSH Plugin Hub; entries such as dsh-browser-control and dsh-browser-playwright appear together, and you pick by compatibility status.

Permission and safety boundaries of browser control DSH plugins

The risk of browser control is that it can visit sites carrying your login state, so credential stripping and a site allowlist are mandatory preconditions. The DeepSeek Harness sandbox constrains a subprocess's file effects (source), but session state, cookies, and local storage inside the browser are a different layer that you must manage yourself. Three boundaries:

1. Which sites it may reach — narrow the scope with an allowlist of only the sites the task truly needs. Expected: login state for unrelated sites is not exposed.
2. Whether to give it credentials — use an incognito session or strip credentials before operating on sensitive sites. Expected: account credentials stay out of model context.
3. Disable first when it misbehaves — turn browser control off immediately on abnormal behaviour, stop the bleeding, then triage. Expected: abnormal actions do not keep happening.

DSH plugin usage notes

1. Dependency before plugin: if the plugin is installed but a page will not open, check whether the browser dependency is complete.
2. The profile must be right: install into the profile you are using, or it will not take effect.
3. Page structure changes: broken selectors are a common failure; re-verify the flow after a site redesign.
4. Do not stack permissions with computer use: for web-only automation, do not enable desktop-level capability.
5. Login state is the biggest risk: keep credentials out where you can, and restrict sites where you can.
6. Search is not operation: use a web search plugin to fetch data, and do not spin up a whole browser to grab a paragraph.

Sources: dsh-browser-control (DSH Plugin Hub), tools subsystem (DeepSeek Harness docs), process sandbox (DeepSeek Harness docs).