Need additional Firefox config option to disable addon signing

[adam-nielsen]

There are some issues with Selenium not working with recent versions of Firefox. It turns out this is because Firefox requires add-on signing, the Selenium WebDriver add-on is not signed, so Selenium cannot remote control Firefox.

As a workaround, the Firefox profile can be modified to disable add-on signing, e.g.:

$caps = Facebook\WebDriver\Remote\DesiredCapabilities::firefox();
$profile = $caps->getCapability(Facebook\WebDriver\Firefox\FirefoxDriver::PROFILE);
$profile->setPreference("xpinstall.signatures.required", false);
$caps->setCapability(Facebook\WebDriver\Firefox\FirefoxDriver::PROFILE, $profile);
$webDriver = Facebook\WebDriver\Remote\RemoteWebDriver::create(
    'http://localhost:4444/wd/hub', $caps
);

I see in DesiredCapabilities::firefox() it is already setting a user preference, so would it be possible to also set xpinstall.signatures.required to false in here, so that the unsigned Selenium addon can still run?

[OndraM]

This won't help, as this configuration option will not be available since Firefox 48, see https://wiki.mozilla.org/Add-ons/Extension_Signing

The current extension-based Firefox WebDriver won't work in FF 48+.

We would probably need to either start using the Marionette driver in Firefox 48 or stick with Firefox ESR.

[myBestSoftAndPref]

How to override the Firefox Add-on Signing requirement
http://www.ghacks.net/2016/08/14/override-firefox-add-on-signing-requirement/

[OndraM]

This is solved by Geckodriver https://github.com/mozilla/geckodriver in Firefox 48+, which replaces the WebDriver addon implementation.