Change 239914 had a related patch set uploaded (by Hashar):
Remove PhantomJS support from browser tests

https://gerrit.wikimedia.org/r/239914

Just a note: the PhantomJS ability to send custom/non-standard headers was used by ZeroBanner. "Luckily" their tests aren't worthwhile anymore so we removed it. Doing custom headers is now not possible, right?

Yup so we wanted to T113280: Stop using PhantomJS for ZeroBanner browser test

Zeljko found out the tests are broken beyond repair/available resources and got rid of them T113463: Delete broken ZeroBanner browsertests Jenkins job after @jhobs +3ed the idea.

Regarding setting custom headers, @zeljkofilipin and I talked about it on Wednesday. I could not found out the Chrome API documentation nor how to set headers. So Zeljko took the lead and:

In T113463#1667809, @zeljkofilipin wrote:

Looks like Selenium does not support adding custom headers, but some browser drivers support it, like phantomjs. Another alternative is to use a proxy like browsermob:

https://github.com/lightbody/browsermob-proxy/
https://github.com/jarib/browsermob-proxy-rb
https://github.com/AutomatedTester/browsermob-proxy-py

And no. We are not going to setup a proxy anytime soon. I guess if we ever want to do such feature switch, we would probably go with a cookie (assuming the browsers drivers let us set a cookie).

So now we can cleanup references to PhantomJS in the browser tests.

I found a bunch of references to it in integration/jenkins.git :-(

In T113279#1672610, @hashar wrote:

And no. We are not going to setup a proxy anytime soon. I guess if we ever want to do such feature switch, we would probably go with a cookie (assuming the browsers drivers let us set a cookie).

:-) Definitely, understood. That was pretty clear from what @zeljkofilipin told me during our 1:1.

In T113279#1672610, @hashar wrote:

I guess if we ever want to do such feature switch, we would probably go with a cookie (assuming the browsers drivers let us set a cookie).

Yes, Selenium does support setting cookies.

Change 239914 merged by jenkins-bot:
Remove PhantomJS support from browser tests

https://gerrit.wikimedia.org/r/239914

The browser test jobs no more rely on PhantomJS. Zerobanner tests have been deleted and Jan deployed the code cleanup.

Now have to investigate PhantomJS usage in integration/jenkins.git.