Start karma tests in Firefox without privacy notice tab and disable extensions - firefox

Question

I am using the karma-firefox-launcher plugin to launch my karama tests in Firefox, which works just fine. However every time it launches, Firefox seems to think this is a first-run and it also opens tabs for the privacy notice page, and another one for an extension.
This is what I see every time I run the tests
I was able to make a custom launcher for Firefox in my karma config file to start it in safe mode, like this:
customLaunchers: {
firefox_custom: {
base: 'Firefox',
flags: ["-safe-mode"]
},
},
Which works, but now it shows this dialog every time (which requires the button to be clicked to continue) and is is equally annoying
In my attempt to disable the privacy notice tab, I've tried setting these preferences, but none have worked. Perhaps I'm not setting them correctly?
flags: ["-pref='app.normandy.first_run=false'"]
and
flags: ["-pref='datareporting.policy.firstRunURL='"]
What CLI flags can I set here to both disable extensions without the additional dialog, and stop the privacy

Answer 1

According to the karma-firefox-launcher docs, you can set preferences directly, so after browsing around in the firefox about:config page and searching for "firstrun" I found a preference named toolkit.telemetry.reportingpolicy.firstRun
So, the following will work to prevent that privacy notice tab from opening, but the Adobe Acrobat extension "welcome" tab still opens.
firefox_custom: {
base: 'Firefox',
prefs: {
'toolkit.telemetry.reportingpolicy.firstRun': false,
}
},
It's improved but not all the way there yet! I'll update this answer if I find anything else out.