David J. M. Karlsen

@birtles but why does it work fine outside of docker on my Mac?

@brendandahl see comment above for debug log output

How strange - I'll do some other testing myself. Linking a similar issue: https://github.com/DevExpress/testcafe/issues/4031

OK, on my desktop (MacOS) in runs fine, on CI server it stalls at: ``` yarn test yarn run v1.17.3 $ karma start --single-run 14 08 2019 21:45:39.178:INFO [karma-server]: Karma...

A bit impatient, it got further but eventually failed: ``` yarn test yarn run v1.17.3 $ karma start --single-run 14 08 2019 21:45:39.178:INFO [karma-server]: Karma v4.2.0 server started at http://0.0.0.0:9876/...

@birtles yes, docker on desktop too, CI does not alter env.

68.0.2 fails as well, 67.0.4 works fine - it is definitely tied to ffox version.

Note for anyone testing the images: the `master` / `node12` tag is now on a downgraded ffox version, while the tag `ffoxbroken` tag points at latest ffox (which is malfunctioning).

The thing I notice is that it just seems incredibly slow - it hogs CPU and runs on close to 100% CPU but still takes an age to get running...

I am also seeing this: ``` 16 08 2019 08:01:24.483:INFO [launcher]: Starting browser FirefoxHeadless 16 08 2019 08:04:51.187:ERROR [launcher]: Cannot start FirefoxHeadless *** You are running in headless mode. [Parent...