# Cannot connect to existing browser
**URL:** https://forum.robotframework.org/t/cannot-connect-to-existing-browser/7807
**Category:** SeleniumLibrary
**Created:** [15 September 2024 14:12 UTC](https://forum.robotframework.org/t/cannot-connect-to-existing-browser/7807 "2024-09-15T14:12:30Z")
**Posts on this page:** 1
**Page:** 1
### Author:  [@opadfnezig](https://forum.robotframework.org/u/opadfnezig)
#### Post date: [15 September 2024 14:12 UTC](https://forum.robotframework.org/t/cannot-connect-to-existing-browser/7807/1 "2024-09-15T14:12:30Z")
Trying to do this [How to use an already running (Chrome) browser for your web automation robots - Robocorp Portal](https://robocorp.com/portal/tutorial/how-to-attach-to-running-chrome-browser)
Running exactly same code, exept everything is on linux in cli.
starting chrome
`./chrome --headless --remote-debugging-port=8222 --remote-debugging-address=0.0.0.0 --no-sandbox --disable-gpu --disable-dev-shm-usage`
code
```
***Settings***
Documentation Google using an already open Chrome browser.
Library RPA.Browser.Selenium
***Tasks***
Attach to running Chrome Browser and execute Google search
Attach Chrome Browser 8222
Go To https://www.google.com/?hl=en
Input Text name:q Dinosaur
Press Keys name:q ENTER
```
output
```
(venv) [user@archlinux robot-client]$ python3.11 -m robot task.robot
2024-09-15 14:00:25,964 - RPA.core.certificates - INFO - Truststore not in use, HTTPS traffic validated against `certifi` package. (requires Python 3.10.12 and 'pip' 23.2.1 at minimum)
==============================================================================
Task :: Google using an already open Chrome browser.
==============================================================================
Attach to running Chrome Browser and execute Google search | FAIL |
WebDriverException: Message: unknown error: cannot connect to chrome at localhost:8222
from unknown error: unable to discover open pages
Stacktrace:
#0 0x555715bbb4e3
#1 0x5557158eac76
#2 0x55571591804a
#3 0x55571590f884
#4 0x55571594eccc
#5 0x55571594e47f
#6 0x555715945de3
#7 0x55571591b2dd
#8 0x55571591c34e
#9 0x555715b7b3e4
#10 0x555715b7f3d7
#11 0x555715b89b20
#12 0x555715b80023
#13 0x555715b4e1aa
#14 0x555715ba46b8
#15 0x555715ba4847
#16 0x555715bb4243
#17 0x7656f8f8c39d
#18 0x7656f901149c
------------------------------------------------------------------------------
Task :: Google using an already open Chrome browser. | FAIL |
1 task, 0 passed, 1 failed
==============================================================================
Output: /home/user/projects/chrome-remote-connection-test/robot-client/output.xml
Log: /home/user/projects/chrome-remote-connection-test/robot-client/log.html
Report: /home/user/projects/chrome-remote-connection-test/robot-client/report.html
```
seems like I’m missing something, but don’t understand what.
also I would really like to use puppeteer instaed of selenium but couldn’t find any ways of using it to connect via ws debug port