#Browser plugin, Browserless, what to do

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stoic crow
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I have just successfully established a connection between OpenClaw and Browserless (on separate docker containers).

.... Now what? Can my agent now magically check Hotmail when I tell it to? Or do I need to teach my agent the way to reach a website, and when to do what, and what to look for, to be able to retrieve the emails?

Email retrieval has just an arbitrary example. My general question is how do I make my agent browse certain websites properly like a human?

hardy pelicanBOT
lone pebbleBOT
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prime cometBOT
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Not magically, but you’re very close 🙂

Browserless gives OpenClaw a browser it can control. It does not automatically teach the agent how Hotmail, Amazon, your bank, etc. work.

What happens now:

  • You give the agent a goal in plain English.
  • The agent uses the browser tool to open pages, inspect the UI, and click/type/read.
  • For many sites, that’s enough.
  • For logged-in or anti-bot-heavy sites, reliability drops.

A few important bits:

  • Do not give the model your credentials. The docs recommend manual login for sites that need auth.
  • If you want an already-signed-in browser, profile="user" is usually better than a fresh remote/headless browser.
  • If a site has an API, use that instead of browser automation. Email is a perfect example, UI automation is usually the brittle option.
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So for your Hotmail example, the answer is basically:

  • Can it try? Yes.
  • Will it “just know”? Sometimes for simple flows, but not guaranteed.
  • Do you need to hand-script every click? Usually no. A good model can often figure it out from the page.
  • For repeated workflows, giving the agent a short SOP helps a lot:
    • only use these domains
    • if login is required, stop and ask me
    • look for unread emails
    • never click delete/send/archive unless I explicitly say so

Good first test:

openclaw browser --browser-profile browserless open https://example.com
openclaw browser --browser-profile browserless snapshot
stoic crow
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I've heard using environmental variables to store passwords, and telling the LLMs to use these "secretref's" env variables as passwords to key into the website, will be a good way to hide passwords from the models. Is that true?

prime cometBOT
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Sort of, but I would not treat that as a safe default for website logins.

The useful distinction is:

  • SecretRefs / env vars are great for keeping secrets out of plaintext config
  • they are not the same thing as “the model can safely use this password without ever seeing it”

For the stock browser flow, the docs are pretty clear:

  • manual login is recommended
  • do not give the model your credentials

So for something like Hotmail/Outlook web, the safer pattern is:

  1. open the target browser profile
  2. you log in manually
  3. then let the agent use the already-authenticated session
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That’s much better than asking the model to fetch a secret and type it into a login form.

Also, SecretRefs in OpenClaw are mainly for supported credential surfaces like API keys, gateway auth, channel tokens, etc. They are not a built-in “browser password autofill without model exposure” feature.

So my short answer:

  • Good for config hygiene? Yes.
  • Good as a magic shield for website passwords typed by the agent? No, I wouldn’t rely on that.
  • Best practice? Manual login, then automate after login.
  • Even better when possible? Use a real API instead of website login automation.

Docs:

If you want, I can sketch the safest setup for “agent reads a website after I’ve logged in once.”

stoic crow
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What if manual login isn't practical (e.g. that website has cookies that expires after 15 min of inactivity, but I want to automate website checking once per hour). What do you suggest, specifically for browserless, or any other headless browser alternatives?

prime cometBOT
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If auth dies every 15 minutes, I would not try to solve that with “a smarter headless browser”.

My honest recommendation order:

  1. Use an API / webhook / IMAP / official integration if one exists
    Best by far for hourly checks.

  2. If the site is UI-only, build a small deterministic Playwright/Puppeteer worker
    Let that handle auth and extraction, with secrets kept outside the model.
    Then let OpenClaw read the result.
    This is much safer and more reliable than having the LLM log in repeatedly.

  3. Use OpenClaw browser automation only after auth is already handled
    Great for “go there, inspect page, summarize, click around”, not great for “re-login every hour forever”.

For Browserless specifically:

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  • it gives you a remote Chromium
  • it does not solve short-lived server-side sessions
  • if the site invalidates auth after 15 minutes, Browserless, Browserbase, local Chrome, all of them still lose

So if the requirement is:

“check once per hour, unattended, after login expires every 15 min”

then the right answer is usually not “better headless”, it’s “different integration method”.

If you truly must automate the UI anyway, I’d do this:

  • custom scripted worker for login + extraction
  • persistent browser profile if allowed
  • credentials resolved outside model context
  • OpenClaw only sees the extracted result, not the password flow
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I would not recommend:

  • asking the LLM to type the password every hour
  • relying on Browserless alone to keep that alive
  • chasing stealth / anti-bot workarounds unless the site explicitly allows automation

Relevant docs:

If you want, I can outline two concrete architectures:

  • “API-first hourly checker”
  • “UI-only fallback with Playwright + OpenClaw”
stoic crow
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So basically ... Hand over the auth process to playwright / puppeteer? Or do any of these docker headless browser solutions have a built-in password manager?

prime cometBOT
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Yeah, basically: hand auth to deterministic code, not to the LLM.

My rule of thumb:

  • Browserless / Browserbase / headless Docker = browser infrastructure
  • Playwright / Puppeteer = deterministic automation
  • 1Password / Vault / Bitwarden / env / SecretRef = secret storage
  • OpenClaw = higher-level reasoning on top

So I’d recommend one of these:

  1. Best: Playwright/Puppeteer does login + fetches the data you need
  2. Also fine: Playwright/Puppeteer only refreshes auth/session, then OpenClaw browses the already-authenticated site

As for a built-in password manager: not really in the way you want.
These headless browser solutions are not a clean “secure password vault for agents” story.

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A browser profile can sometimes store passwords/cookies, but that just means:

  • the secret/session now lives in browser state
  • you still have to manage persistence, expiry, container state, rotation, etc.
  • it does not become magically safe for LLM-driven login

So if you need unattended auth, I’d do:

  • secrets in 1Password / Vault / Bitwarden / env
  • deterministic Playwright/Puppeteer script reads them
  • OpenClaw consumes the result, or uses the authenticated session afterward

Honestly, if you already need Playwright for auth refresh, I’d often just let Playwright do the whole hourly check and send OpenClaw only the extracted content. That’s the least fragile setup.

If you want, I can sketch a minimal architecture for:

  • Playwright login worker + Browserless
  • or Playwright-only hourly checker
stoic crow
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I know this is outside your realm, but just one quick question on Browserless - does it support password storing in a profile?

prime cometBOT
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Short version: not really as a password manager, but yes, Browserless can persist browser profile state.

According to the Browserless docs, --user-data-dir can persist:

  • cookies
  • localStorage
  • cache
  • login sessions

So if you’re self-hosting Browserless in Docker, you can keep that state around by using a persistent user-data-dir and mounting a Docker volume.

A few caveats they mention:

  • this is profile/session persistence, not a real secret vault
  • only one browser can use the same user-data-dir at a time
  • on their shared cloud plans, --user-data-dir is not available
  • on multi-worker setups, profile data lives on a specific worker
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So my practical answer is:

  • Yes for persisted session/profile state
  • No, I would not think of it as a built-in password manager

Browserless doc:
https://docs.browserless.io/enterprise/user-data-directory

If you want, I can help translate that into a sane Docker setup pattern for OpenClaw + Browserless.

stoic crow
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So the way I see it, if I really want that to work, is to have one file in the user-data-dir that stores the password, and then instruct my agent to tell browserless to place the content of that file into the password field of the website. Will that work in theory?

prime cometBOT
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In theory, yes. In practice, I really would not do that.

Two important problems:

  1. That’s not a built-in OpenClaw/Browserless flow
    You’d need custom glue that can read that file and feed it into the page.

  2. It creates a bad security boundary
    At that point you’ve basically built “agent can access password material and decide where to type it”.
    That’s exactly the part I’d keep out of the LLM loop.

So my honest answer is:

  • Will it work in theory? Yes, with custom code.
  • Is it a good design? No.
  • Would I trust it for unattended auth? Also no.
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Much better pattern:

  • password lives in secret manager / env / vault
  • deterministic Playwright/Puppeteer code handles login
  • agent only gets the post-login session or the extracted result

Also, I wouldn’t use user-data-dir as a general password-file storage area.
That directory is really for browser state, not for “agent-readable secret files”.

So if your goal is reliable unattended login, my recommendation is still:

  • auth handled by deterministic code
  • reasoning/extraction handled by OpenClaw

If you want, I can sketch the exact “least-bad” version of this setup in 5 bullets.

stoic crow
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No, the agent doesn't have access to that file, it will help me write the code necessary for chrome CDP (sp?) to grab then place into the website. Or do I have the concept all wrong?

prime cometBOT
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You’re close, but the layers are a bit mixed up.

CDP = Chrome DevTools Protocol, yes.
But I would think about it like this:

  • Browserless = remote Chrome/CDP endpoint
  • Playwright/Puppeteer = the code you write to drive that browser
  • your code = reads the secret from env/file/vault
  • the browser = receives the typed value

So the cleaner mental model is not:

“tell Browserless to read a file and paste it”

It’s:

“my script reads the secret, then my script uses Playwright/Puppeteer/CDP to fill the field in the Browserless-controlled browser”

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So yes, the agent could help you write that script.
That part is reasonable.

If it were me, I’d use Playwright, not raw CDP, unless you have a very specific reason to go low-level. It’s much nicer for:

  • connect to Browserless
  • open page
  • fill username/password
  • click login
  • save/reuse session state

So your concept is not wrong, just slightly reframed:

  • don’t make Browserless the secret reader
  • make your own deterministic script the secret reader
  • let Browserless just be the browser backend
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Honestly, once you’re writing that script, I’d often let it do the whole login + extraction job, and use OpenClaw only for the reasoning/summarization layer.

If you want, I can give you the clean 4-step architecture for Playwright + Browserless + OpenClaw.

stoic crow
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Btw puppeteer is just the name of the language? Or do I actually have to install something called puppeteer? Right now in my browser list environment, if I go to http://browserless_IP:3000/debugger, I can actually write code that automates website manipulation. So that code is called puppeteer code? Or something else altogether?

prime cometBOT
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Puppeteer is not a language. It’s a JavaScript/TypeScript library.

The stack is roughly:

  • JavaScript / TypeScript = language
  • Puppeteer / Playwright = automation libraries
  • CDP = Chrome DevTools Protocol, the lower-level browser control protocol
  • Browserless = remote browser service that those tools connect to

So if you’re writing code in the Browserless debugger, that code is usually best thought of as:

  • JavaScript
  • using Puppeteer-style browser automation
  • against a Browserless/CDP-backed browser

From Browserless’ docs, their live debugger is very much tied to Puppeteer code / their Puppeteer integration, while they also support Playwright from your own scripts.

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So, short answer:

  • Do you install something called Puppeteer?
    Yes, normally in your own app/script you would install the Puppeteer npm package.

  • Is the code in the Browserless debugger “Puppeteer code”?
    Pretty much yes, or at least JavaScript written for Browserless’ Puppeteer-style environment.

Useful mental shortcut:

Puppeteer = library
JavaScript = language
CDP = protocol

Browserless docs:

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If you want, I can give you a tiny “what is what” diagram for Browserless + CDP + Puppeteer + Playwright + OpenClaw.

stoic crow
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So the way I see it, browserless in and of itself already knows how to interpret JavaScripts (intended for its consumption) to automate website browsing / data retrieval. Why the need to install stuff like playwright or puppeteer?

prime cometBOT
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Yep, that’s basically the right idea.

Browserless can be the thing that runs or hosts the browser automation, so in some flows you do not need to install Puppeteer/Playwright locally.

Why people still use Puppeteer/Playwright:

  • they give you nice APIs like page.goto(), click(), fill(), waiting, selectors, etc.
  • they hide the ugly low-level CDP details
  • they make it easier to write your own script/app outside the Browserless UI

So the split is:

  • Browserless = remote browser service / execution environment
  • Puppeteer / Playwright = convenient client libraries for talking to that browser

If you use:

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  • Browserless live debugger
  • Browserless function API
  • maybe other Browserless-specific surfaces

then Browserless may already provide the environment, and you don’t necessarily need a local install.

If you write your own app/script, then you usually install Puppeteer or Playwright because otherwise you’d be doing one of these:

  1. using raw CDP yourself, which is annoying
  2. depending entirely on Browserless-specific APIs/UI

So the short answer is:

  • No, you don’t always need to install Puppeteer/Playwright
  • Yes, Browserless can already execute automation code in some modes
  • People install Puppeteer/Playwright because it’s the nicest way to author and maintain that code
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Analogy:

Browserless is the remote Chrome machine
Puppeteer/Playwright are the steering wheel

If you want, I can show the 3 common modes side by side:

  • OpenClaw browser tool
  • Browserless debugger/function API
  • your own Playwright/Puppeteer script
stoic crow
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Well I don't have to, my agent will have to write these scripts for browser list specific apis.... Right?

prime cometBOT
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Not by default, no.

If your setup is:

OpenClaw agent → OpenClaw browser tool → Browserless

then the agent usually does not need to write Browserless-specific scripts just to browse a site.

That’s the whole point of the OpenClaw browser tool. The agent uses commands like:

  • open page
  • snapshot page
  • click/type/select
  • read content

and OpenClaw handles talking to Browserless/CDP underneath.

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So:

  • normal browsing through OpenClaw → no custom Browserless scripts needed
  • custom unattended workflow outside normal agent browsing → maybe yes, then a script can make sense

You only really need Browserless-specific scripts if you want something more like:

  • your own standalone automation job
  • login/session refresh worker
  • scheduled scraping/checking pipeline
  • direct use of Browserless function/debugger APIs

So the clean mental model is:

  • OpenClaw browser tool = high-level abstraction
  • Browserless = backend browser engine
  • custom scripts = optional extra layer for special workflows
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In other words, the agent does not need to write Browserless scripts just to use Browserless through OpenClaw.
It only needs them if you choose a more custom architecture.

That’s an important distinction, and I’m glad we caught it. If you want, I can map your options into:

  1. pure OpenClaw
  2. OpenClaw + custom auth worker
  3. full custom Browserless automation
stoic crow
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... But if it involves opening a file in a browserless profile's user-data-dir, then inserting the content to a specific field in the web page, then I (or the agent) DO need to write a script that browserless will understand.... Right??

prime cometBOT
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Yes, for that exact custom behavior, you’d need custom code.

But I’d phrase it slightly differently:

  • not “a script that Browserless understands”
  • more “a script you write that uses Browserless as the browser backend”

That script would need to do two separate things:

  1. read the file from wherever you stored it
  2. fill the field in the page via Playwright/Puppeteer/CDP

Browserless itself is not really “read local file from profile dir and paste into form” magic. It’s the remote browser/CDP side.

So for your specific flow:

open file from user-data-dir → get contents → type into password field

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the answer is:

  • yes, custom code required
  • no, stock OpenClaw browser tool won’t do that by itself
  • and I still wouldn’t recommend that design

The safer version is:

  • your script reads the secret from a proper secret source
  • your script logs in
  • Browserless just hosts the browser session
  • OpenClaw works after that

So you’re not confused, you’ve just reached the point where it stops being “plain browser tool usage” and becomes “custom automation engineering.”

stoic crow
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Yeah, and I am talking about getting my agent to WRITE that script without having to use puppeteer as the middle layer, since browserless understands scripts intended for it apparently (as evident with its dubugger tool)

prime cometBOT
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Yep, that’s a valid path, with one important correction:

It’s not really “Browserless-native script language”.

It’s more like:

  • the agent writes JavaScript
  • for Browserless’s debugger / function API
  • and that environment is still basically Puppeteer-style automation under the hood

So you can avoid installing Puppeteer locally, if Browserless is the place executing the code.

But you are not escaping the Puppeteer-ish model entirely.
You’re just moving the runtime from:

  • your machine + local Puppeteer
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to:

  • Browserless-hosted execution environment

So the clean answer is:

  • Can your agent write the script? Yes.
  • Can it target Browserless’s debugger/function API directly? Yes.
  • Does that mean Browserless has its own totally separate scripting language? No, not really.
  • Are you still doing custom automation engineering? Very much yes.

And for your specific auth-file idea, that still means:

  • custom JS/script
  • custom logic for reading the secret
  • custom logic for filling the field
  • Browserless just provides the execution/browser side
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So your concept is mostly right, just with this tweak:

You’re not avoiding automation libraries conceptually.
You’re mainly avoiding installing them locally.

If you want, I can give you the one-sentence distinction between:

  • OpenClaw browser tool
  • Browserless function/debugger code
  • local Playwright/Puppeteer script
stoic crow
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Yeah I just want to avoid installing extra stuff if I don't have to, especially if puppeteer is not just a library but some interpreter that constantly runs in the background

prime cometBOT
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Totally fair, and the good news is: Puppeteer is not a background daemon.

It’s basically:

  • a Node.js library/package
  • that your script imports
  • and it only does anything when your script runs

So:

  • Browserless = the thing running in the background
  • Puppeteer = just the steering library your script can use

It is not some separate interpreter sitting there all day.

So if your goal is:

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“avoid extra always-on components”

then you’re fine. Installing Puppeteer would usually just mean:

  • add npm package
  • run script when needed
  • exit when done

And if you want to avoid even that local install, then yes, leaning on Browserless debugger / function API is a reasonable path.

So the practical answer is:

  • No, Puppeteer is not a constantly running background thing
  • Yes, you can avoid installing it locally if Browserless already gives you the execution surface you want

You’re mostly deciding between:

  1. local script + Puppeteer
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  1. Browserless-hosted script/debugger
  2. pure OpenClaw browser tool

All 3 are valid, just different tradeoffs.

stoic crow
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Oh... I mainly don't want want extra modules that takes up my HW resources... So in that case I should explore puppeteer, and for what I want to achieve, store my password in a local file somewhere in the OpenClaw container, so when the puppeteer script is run, it can read the file to get the password and use it to populate the pwd field in the chromium browser inside browserless?

prime cometBOT
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You’re close, but I’d tweak one important part:

Yes: explore Puppeteer if you want a lightweight client layer.
No: I would not store the password as a normal local file inside the OpenClaw container if you can avoid it.

A better mental model:

  • Browserless/Chromium is the heavy part
  • Puppeteer is just a small client library by comparison
  • so the extra HW cost of Puppeteer is usually tiny next to the browser itself

For the secret, the least-bad pattern is:

  • keep password in a Docker secret / env var / mounted secret file
  • let the Puppeteer script read it directly
  • let the script fill the password field in Browserless
  • keep the password out of OpenClaw prompts/workspace/user-data-dir
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So I would recommend:

  1. Browserless container hosts Chromium
  2. small script connects to Browserless
  3. script reads secret from Docker secret / env / mounted secret path
  4. script logs in / refreshes session
  5. OpenClaw uses the authenticated result/session afterward

If you must use a file, make it a dedicated mounted secret file, not “some random file inside the OpenClaw container”.

So short answer:

  • Puppeteer: yes, reasonable
  • password in plain file inside OpenClaw container: I’d avoid that
  • password via secret mount/env to the script: much better

If you want, I can give you the least-bad Docker layout for this in one message.

stoic crow
prime cometBOT
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Ah, yep, this is the key distinction.

Full puppeteer often downloads its own Chrome/Chromium.
If you already have Browserless, then for many cases you’d use puppeteer-core instead, which the Puppeteer docs say does not download Chrome.

So:

  • puppeteer = client library plus bundled browser convenience
  • puppeteer-core = client library only
  • Browserless = the actual browser backend

Which means your question has an honest answer:

If you just want one local script on one machine

You might not need Browserless at all.
Plain Puppeteer can be enough.

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If you want the browser separated out

Browserless is useful for things like:

  • browser runs in its own Docker/service
  • OpenClaw and other scripts can share the same browser backend
  • remote access / central browser infra
  • Browserless live debugger, session viewer, etc.
  • keeping browser deps off your app container

For your case

If you want to keep Browserless, the clean pairing is usually:

  • Browserless for Chromium
  • puppeteer-core as the lightweight client

So you were right to question it.
If Browserless is already doing the browser part, full Puppeteer downloading another Chromium is kind of redundant.

stoic crow
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My agent is now recommending to install playwright-python. What do you think?

prime cometBOT
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I think it’s reasonable, with one big caveat:

If your goal is a custom Python automation script, then playwright-python is a legit choice.

But I’d only say yes if the script is going to connect to Browserless, not launch its own local browser stack.

So my take is:

  • For pure OpenClaw usage: probably unnecessary
  • For a custom auth / login / refresh worker in Python: totally reasonable
  • For low-HW / no duplicate browser installs: make sure it uses Browserless as the browser backend

That’s the key question to ask your agent:

“Will this Playwright Python setup connect to Browserless remotely, or is it going to install/launch its own local browser?”

If it’s the second one, I’d push back.