was it because model was taking some time to load? I'm asking because playwright has events that tri

was it because model was taking some time to load?
I'm asking because playwright has events that trigger when requests complete, so it's possible to wait until a *.glb model is loaded, for instance

RRui Figueira was it because model was taking some time to load? I'm asking because playwright...

Rui FigueiraOP•6/26/25, 5:15 PM

well, it seems webgl is not enabled in browser rendering

Kathy•6/27/25, 11:44 PM

thanks all for the discussion. we'll look into adding support for webGL

NNeonSpectre I have been trying to use pupeteer in browser rendering worker binding and the w...

Kathy•6/27/25, 11:45 PM

hi there - made a fix so that debug logging is now OFF by default

Kathy•6/27/25, 11:45 PM

thanks @Rui Figueira for the help~

kchro3•6/28/25, 7:55 PM

Hi, I have some security related questions on how the Playwright MCP server works.

I was able to integrate the playwright MCP agent onto my hono backend app, and i was able to connect my Claude desktop to my local worker with a remote binding on the browser. it's really cool, but it's hard to tell what's going on.

is there idea that there is a persistent web browser connection during the lifetime of the chat session? if so, would every connection get its own browser instance / would they be shared across connections?

in general, are there recommendations on how to compose playwright MCP with specific kinds of tasks? for example, i think it could make sense to define separate playwright MCPs per web application with custom tools that are built to interact with those websites, but it sort of looks like the playwright MCP is meant to be a general purpose browser agent with only basic primitives.

JJames Can https://github.com/cloudflare/puppeteer/issues/91 please be re-opened? And c...

DaniFoldi•6/30/25, 2:06 PM

pretty sad that nothing's been done about this..

DDaniFoldi pretty sad that nothing's been done about this..

James•6/30/25, 2:06 PM

agreed, can we get some attention on this one please @Kathy ?

JJon M.Ya, this was my problem! That's why I had to switch to Browserless.io. Which is ...

Mr. Technician•6/30/25, 2:22 PM

i’m working on setting up browserless within a cloudflare container

Mr. Technician•6/30/25, 2:22 PM

speaking of, what version of wrangler are you running?

JJon M.At the time, I was using the most up to date version. I try to keep it up to dat...

Mr. Technician•7/2/25, 5:29 PM

probably not

Mr. Technician•7/2/25, 5:29 PM

though i’ve run into some issue with versions

juanferreras•7/3/25, 1:07 PM

I'm building a webperf tester (e.g. say similar to PageSpeed Insights) but on top of CF Puppeteer. I saw turnstile/bot challenges on some Cloudflare zones, but I'm surprised that Cloudflare's Radar itself also does get challenged.

I guess this is bot traffic so it makes sense. Would the expected behavior be that any domains who aggressively block bots should allow explicitly (via custom header or user-agent)? Or if you hit enough traffic (+1k requests/day) apply to be a verified bot?

Mr. Technician•7/4/25, 4:02 PM

has anyone else run into this? https://github.com/cloudflare/workers-sdk/issues/9792

GitHub

puppeteer.connect() throws "ws does not work in the browser. Browse...

What versions & operating system are you using? Wrangler 4.16.0 Please provide a link to a minimal reproduction No response Describe the Bug As described here, versions of wrangler including an...

Mr. Technician•7/4/25, 4:02 PM

i’m currently unable to work on this project and test cloudflare containers as the newer wrangler versions that support containers break other critical parts of the site

KT•7/4/25, 4:51 PM

I'm trying to create screenshot from html via the REST API. But I ran into some issues. For an element with the backdrop-filter CSS property, the inner elements are not rendered.

{
  "html": "<!DOCTYPE html>\n<html>\n<head>\n  <script src=\"https://cdn.tailwindcss.com\"></script>\n</head>\n<body>\n<div id=\"render-result\" class=\"relative size-32\">\n    <div class=\"absolute inset-6 size-20 rounded-lg flex bg-white/30\" style=\"backdrop-filter: blur(10px)\">\n      foo bar\n    </div>\n    <img class=\"size-32 rounded-lg object-cover\" src=\"https://images.unsplash.com/photo-1554629947-334ff61d85dc?q=90\">\n    <div class=\"absolute inset-0 rounded-lg ring-1 ring-black/10 ring-inset\"></div>\n</div>\n</body>\n</html>",
  "selector": "#render-result",
  "screenshotOptions": {
    "type": "webp"
  }
}

{
  "html": "<!DOCTYPE html>\n<html>\n<head>\n  <script src=\"https://cdn.tailwindcss.com\"></script>\n</head>\n<body>\n<div id=\"render-result\" class=\"relative size-32\">\n    <div class=\"absolute inset-6 size-20 rounded-lg flex bg-white/30\" style=\"backdrop-filter: blur(10px)\">\n      foo bar\n    </div>\n    <img class=\"size-32 rounded-lg object-cover\" src=\"https://images.unsplash.com/photo-1554629947-334ff61d85dc?q=90\">\n    <div class=\"absolute inset-0 rounded-lg ring-1 ring-black/10 ring-inset\"></div>\n</div>\n</body>\n</html>",
  "selector": "#render-result",
  "screenshotOptions": {
    "type": "webp"
  }
}

p1: cloudflare browser rendering REST API.
p2: browserless REST API

juanferreras•7/7/25, 10:34 PM

hey all! is there any (very rough) ETA for the new pricing announcement?

Silvan•7/8/25, 10:56 PM

Oh local mode support?

Gravite2090•7/9/25, 5:53 PM

Hello friends. I can not seem to auth with the browser rendering api, I am trying to CURL on my local system. I've checked the token's permissions, Browser Rendering - Edit is set. I checked the token itself. But I keep getting a 401 {"result":null,"success":false,"errors":[{"code":10000,"message":"Authentication error"}],"messages":[]}%

Do these api calls only work from workers running on cloudflares internal network? Or is my request malformed? Thanks a ton for any help

curl -X 'POST' 'https://api.cloudflare.com/client/v4/accounts/******/browser-rendering/content' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer *' \
-d '{"url": "https://example.com"}'

Edit: Looks like this api endpoint only works with User scoped tokens, not account tokens. Is that true?

Final edit: I was using a bad token, I'll see myself out.

Mohammed K•7/12/25, 7:59 AM

hey guys, has anyone noticed any issues with browser rendering since yesterday?

we use it for a pdf printing service and it seems something changed which broke the way our printing happens

juanferreras•7/13/25, 2:27 PM

(could be unrelated but) we're also seeing an odd spike in some timings collected by Browser Rendering (Puppeteer) since the 12th of July early morning UTC

katu•7/14/25, 11:06 AM

Hi, I see there has been talk about WebGL before. It's a bit of a make-or-break point for me, and the fact that it's not supported is probably going to drive me to other browser rendering products. Wondered if there's any plans on this front? It was also frustrating to find this out in practice, since it doesn't appear to be mentioned in any docs.

Jjuanferreras (could be unrelated but) we're also seeing an odd spike in some timings collecte...

Mohammed K•7/14/25, 12:39 PM

It turns out we had to add another “wait for idle network” call during the print flow which wasn’t needed before, weirdly enough. Not sure what made this change needed, we hadnt changed anything for over a week when the behaviour change happened.

MMohammed K It turns out we had to add another “wait for idle network” call during the print...

juanferreras•7/14/25, 12:43 PM

thanks! that makes sense, I haven't checked my logs but there must have been a change of infrastructure/location/etc that could make certain things take longer/timeout for example

thasmo•7/14/25, 6:03 PM

Hey!

I'm using the Cloudflare PDF REST API to render a URL to PDF and weirdly enough it seems that for a reason I can't find, the only image on the page does not render in the PDF. When using the native puppeteer client from localhost I have no issues rendering the PDF with the image. I'd assume that either Cloudflare does not load the image for some reason or the remote host (Netlify) does block the request from Cloudflare, although the request for the actual HTML file is just fetch correctly by Cloudflare. Are there any known issues regarding image loading or any related topics? Thanks a lot!

Kathy•7/15/25, 9:20 PM

thanks y'all for the reports on timing issues over the weekend. this should be resolved now. please let me know if not @katu @juanferreras @Mohammed K

SSilvan Oh local mode support? 👀

Kathy•7/15/25, 9:21 PM

yes! we were able to add late last week (while i was ooo) so announcement didn't officially go out yet

KKathy thanks y'all for the reports on timing issues over the weekend. this should be r...

katu•7/16/25, 7:50 AM

Hey I actually asked about something different

WebGL support

JJon M.Ya @Kathy , let's have that now 😉

katu•7/16/25, 5:07 PM

I can understand why it’s a complex thing to offer though. WebGL then implies need for substantial GPU resources (I would need this too!)

Kathy•7/16/25, 7:35 PM

WebGL is on the list of things to do @katu @Jon M.

Jjuanferreras hey all! is there any (very rough) ETA for the new pricing announcement?

Kathy•7/16/25, 7:35 PM

pricing is out https://developers.cloudflare.com/browser-rendering/platform/pricing/
emails will be going out shortly

Cloudflare Docs

Pricing

Browser Rendering is currently available at no cost up to the limits specified, with billing beginning on August 20, 2025 at the following rates:

Advany•7/17/25, 5:07 AM

Oeff... my bill will go to 600 a month for only browsers...

Silvan•7/17/25, 12:05 PM

i mean yea doing this stuff isnt cheap lol god bless my pdf generation takes 1 second

Silvan•7/17/25, 12:08 PM

what i wonder more about is if theres a built in way to limit concurrency? like a queue or do i need to keep track of this myself? im not expecting to hit 10+ concurrent ones but still interesting to know

SSilvan what i wonder more about is if theres a built in way to limit concurrency? like ...

Kathy•7/17/25, 4:55 PM

you can use queues or reusing sessions will help too. +if you're worried about cookies between sessions you can use incognito context (https://pptr.dev/api/puppeteer.browser.createbrowsercontext) and not worry about pollution

Browser.createBrowserContext() method | Puppeteer

Creates a new browser context.

Silvan•7/17/25, 5:16 PM

im just worried to hit 11 concurents for a second and get billed 2$ for nothing bascially x)

Kathy•7/17/25, 5:20 PM

valid concern - let me try to explain.
we're not trying to ding you if you go over to 11 for one day. we calculate the average over the month, not the max you ever hit during the month

i tried to explain using this example here. lmk if makes sense/rec on how to make more clear https://developers.cloudflare.com/browser-rendering/platform/pricing/#example-workers-bindings-pricing

SSilvan im just worried to hit 11 concurents for a second and get billed 2$ for nothing ...

Kathy•7/17/25, 5:21 PM

oops forgot to tag for the above message

KKathy valid concern - let me try to explain. we're not trying to ding you if you go o...

Silvan•7/17/25, 5:23 PM

OH! yea reading is hard okay no thats nice and gets rid of my concerns thanks :)

SSilvan OH! yea reading is hard okay no thats nice and gets rid of my concerns thanks :)

Kathy•7/17/25, 5:24 PM

great! yea that was something we thought of

Kathy•7/17/25, 6:02 PM

If you're a user of Browser Rendering you SHOULD have received an email yesterday with the pricing update. If you did not, please let me know~

Aandreaselia Using the Browser Rendering API to create a new page, go to the URL of a PDF, an...

trace•7/17/25, 9:13 PM

Were you able to solve this issue?

trace•7/17/25, 10:00 PM

How long should browser rendering take to take a screenshot? I set the timout at 10-15seconds and a lot of requests are failing.

soitchu•7/18/25, 7:02 PM

Hi! I had a quick question. We are looking into using browser rendering for a feature we are currently developing. One worry we have is that 10 concurrent browser sessions wouldn't be enough. I realize that we could fill out the form to increase that limit, but we aren't sure what the adoption of the feature would be like, so we don't currently have a concrete number. I just wanted to make sure we could increase that limit to something like 50-100, which is what I'm expecting our usage to be around.

Ttrace How long should browser rendering take to take a screenshot? I set the timout at...

Kathy•7/18/25, 10:31 PM

looking at some data...typically 2-6 seconds for screenshot. We had an issue last few days where loading has been slow which might be impacting you. Can you try again today? there was a another change implemented earlier today

{ "html": "<!DOCTYPE html>\n<html>\n<head>\n <script src=\"https://cdn.tailwindcss.com\"></script>\n</head>\n<body>\n<div id=\"render-result\" class=\"relative size-32\">\n <div class=\"absolute inset-6 size-20 rounded-lg flex bg-white/30\" style=\"backdrop-filter: blur(10px)\">\n foo bar\n </div>\n <img class=\"size-32 rounded-lg object-cover\" src=\"https://images.unsplash.com/photo-1554629947-334ff61d85dc?q=90\">\n <div class=\"absolute inset-0 rounded-lg ring-1 ring-black/10 ring-inset\"></div>\n</div>\n</body>\n</html>", "selector": "#render-result", "screenshotOptions": { "type": "webp" } }

was it because model was taking some time to load? I'm asking because playwright has events that tri

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