Disable javascript with selenium WebDriver?

Question

I have a program that tests some of our sites with javascript disabled. It worked well, until we updated from WebDriver 2.4.5 to the latest. Now I get this error:

java.lang.IllegalArgumentException: Preference javascript.enabled may not be overridden: frozen value=true, requested value=false

It looks like the argument to disable JS is no longer allowed. I can't downgrade the WebDriver because the earlier versions don't work correctly with our updated Firefox.

What are my options for testing with JS disabled? I know Chrome never worked before, and now Firefox doesn't. I tried searching for "webdriver js disabled" but the results just bring back the javascript.enabled, false argument that no longer seems to work.

I just tried using HTMLUnit with js disabled. And it works, however screenshots are not possible with it since it doesn't render anything (and I need to be able to take screenshots) — Andrio
– Andrio, Commented Aug 29, 2015 at 16:24

Rich · Accepted Answer · 2016-01-23 12:10:44Z

1

Best I could come up with is;

Create a new Firefox profile called NoJs by starting it with -P

Go to about:config and disable javascript there

Use this profile in selenium

ProfilesIni allProfiles = new ProfilesIni();
FirefoxProfile profile = allProfiles.getProfile("NoJs");

WebDriver driver = new FirefoxDriver(profile);

answered Jan 23, 2016 at 12:10

Rich

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