Has anyone been able to make this ferrum code work on a rails app hosted on Heroku?

[domin8guy]

This is working great in my DEV environment but in my production app hosted on Heroku, I get the error "Ferrum::ProcessTimeoutError (Browser did not produce websocket url within 30 seconds, try to increase :process_timeout.

I have the required Heroku supported buildpack for Chrome, and am using the headless and no-sandbox options on the Browser.new command,

The heroku Which commands return a path for both
Chrome: /app/.chrome-for-testing/chrome-linux64/chrome
and
Chrome driver: /app/.chrome-for-testing/chromedriver-linux64/chromedriver

Has anyone gotten this to work in Heroku?

UPDATE: 4/25/2025 I have this working in Heroku now!

I had read numerous recommendation to add the no-sandbox option which I did as a parameter to the Ferrum::Browser.new paramter list. What I did not realize, is that it needed to be in another parameter called browser_options. Once I added the , browser_options: {'no-sandbox': true} parameter it now works perfectly!
browser = Ferrum::Browser.new(headless: true,
"no-sandbox": true,
"disable-gpu": true,
"print-to-pdf": true,
browser_name: :chrome,
process_timeout: 30,
timeout: 200,
pending_connection_errors: true**, browser_options: {'no-sandbox': true}**)

[route]

you don't need chrome driver for Ferrrum only chrome. try spawning chrome process manually with given flags, see the output, I believe I've seen permissions issues in the past

[domin8guy]

Thank you for taking the time to offer suggestions..