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Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

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Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#61

Post by ndr »

WARNING for Cursor users:

Cursor is currently stuck using an outdated snapshot of the VSCode Marketplace, meaning several extensions within Cursor remain affected by high-severity CVEs that have already been patched upstream in VSCode. As a result, Cursor users unknowingly remain vulnerable to known security issues. This issue has been acknowledged but remains unresolved: https://github.com/getcursor/cursor/issues/1602#issuecomment...

Given Cursor's rising popularity, users should be aware of this gap in security updates. Until the Cursor team resolves the marketplace sync issue, caution is advised when using certain extensions.

I've flagged it here, apologies for the repost: https://news.ycombinator.com/item?id=43609572

Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#64

Post by rs186 »

ndr wrote: post #61

WARNING for Cursor users: Cursor is currently stuck using an outdated snapshot of the VSCode Marketplace, meaning several extensions within Cursor remain affected by high-severity CVEs that have already been patched upstream in VSCode. As a result, Cursor users unknowingly remain vulnerable to known security issues. This issue has been acknowledged but remains unresolved: https://github.com/getcursor/cursor/issues/16…

I am surprised that the VSCode team hasn't gone after them for mirroring the marketplace, as the Visual Studio team made it very clear that they don't want anybody to do that -- it is their marketplace.

Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#65

Post by cadence- »

namuorg wrote: post #53
cadence- wrote: post #50

Doesn't work on Windows: 2025-04-07T18:43:26.537Z [browsermcp] [info] Initializing server... 2025-04-07T18:43:26.603Z [browsermcp] [info] Server started and connected successfully 2025-04-07T18:43:26.610Z [browsermcp] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} node:internal/e…

Can you try again? There was another comment that mentioned that there's an issue with port killing code on Windows: https://news.ycombinator.com/item?id=43614145 I just published a new version of the @browsermcp/mcp library (version 0.1.1) that handles the error better until I can investigate further so it should hopefully work now if you're using @browsermcp/mcp@latest. FWIW, Claude Desktop currently has a bug wher…

It's working now with the 0.1.0 for me. But I will let you know if I experience any issues once I get updated to 0.1.1.

Thanks, great job! I like it overall, but I noticed it has some issues entering text in forms, even on google.com. It's able to find a workaround and insert the searched text in the URL, but it would be nice if the entry into forms worked well for UI testing.

Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#66

Post by thenaturalist »

Crazy, in looking up some info on the web and creating a Spreadsheet on Google Sheets to insert the results, it worked almost perfectly the first time and completely failed subsequently on 8-10 different tries.

Is there an issue with the lag between what is happening in the browser and the MCP app (in my case Claude Desktop)?

I have a feeling the first time I tried it, I was fast enough clicking the "Allow for this chat" permissions, whereas by the time I clicked the permission on subsequent chats, the LLM just reports "It seems we had an issue with the click. Let me try again with a different reference.".

Actions which worked flawlessly the first time (rename a Google spreadsheet by clicking on the title and inputting the name) fail 100% of subsequent attempts.

Same with identifying cells A1, B1, etc. and inserting into the rows.

Almost perfect on 1st try, not reproducible in 100% of attempts afterwards.

Kudos to how smooth this experience is though, very nice setup & execution!

EDIT 2: The lag & speed to click the allow action make it seemingly unusable in Claude Desktop. :(

Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#67

Post by SSLy »

rs186 wrote: post #64
ndr wrote: post #61

WARNING for Cursor users: Cursor is currently stuck using an outdated snapshot of the VSCode Marketplace, meaning several extensions within Cursor remain affected by high-severity CVEs that have already been patched upstream in VSCode. As a result, Cursor users unknowingly remain vulnerable to known security issues. This issue has been acknowledged but remains unresolved: https://github.com/getcursor/cursor/issues/16…

I am surprised that the VSCode team hasn't gone after them for mirroring the marketplace, as the Visual Studio team made it very clear that they don't want anybody to do that -- it is their marketplace.

It seems that there is one sane PM left at VScode who knows that such move would only lead to MSFT losing more PR. And anti-trust scrutiny?

Re: Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

#68

Post by SSLy »

DeathArrow wrote: post #48
bhouston wrote: post #44

So the website claims: "Avoids bot detection and CAPTCHAs by using your real browser fingerprint." Yeah, not really. I've used a similar system a few weeks back (one I wrote myself), having AI control my browser using my logged in session, and I started to get Captcha's during my human sessions in the browser and eventually I got blocked from a bunch of websites. Now that I've stopped using my browser session in that…

It might depend on the speed with which you click on the elements on the website.

it does, CF bans my own honest to God clicks if I do them too fast.
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