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A headless browser is a web browser without a user interface, it means the browser is running in the background (invisbile). This is great if you want to start a web browser to do tasks, but you don’t want or need to see it.
Module selenium-webdriver/firefox Defines the WebDriver client for Firefox. Before using this module, you must download the latest geckodriver release and ensure it can be found on your system PATH. Selenium firefox headless. A headless browser is a web browser without a user interface, it means the browser is running in the background (invisbile). This is great if you want to start a web browser to do tasks, but you don’t want or need to see it. Download selenium-firefox-driver-2.4.0.jar. Selenium-firefox/selenium-firefox-driver-2.4.0.jar.zip( 1,123 k) The download jar file contains the following class files.
You can use any Web Browser like Firefox or Chrome in a headless mode. To do so, first open up the Web Browser using the Web Driver and then set it to headless mode. In any case, the web driver needs to be installed.
Before you start, make sure the Web Browser, the Web Driver and the selenium module are all installed and working.
The code below starts Firefox, but in headless mode. It can do anything Firefox can, but it wont be visible on the screen. The screenshot below outputs the html code of the web page, but that’s optional.
It’s set as headless browser here, where FirefoxOptions() is used to make it headless.
After loading the headless web browser, you can proceed to using it as you would normally do with selenium. The only difference is that it’s not visible to the user.
If you are new to selenium, then I highly recommend this book.
In this section, we will learn how to run your Selenium Test Scripts on Firefox Browser.
Before proceeding with this section, let us first understand the basics of Gecko Driver.
The term Gecko refers to Gecko browser engine which was developed by Mozilla Foundation as a part of Mozilla browser.
Gecko Driver serves as a link between your tests in Selenium and the Firefox browser. It acts as a proxy between W3C WebDriver-compatible clients (Eclipse, Netbeans, etc.) to interact with Gecko-based browser (Mozilla Firefox).
Marionette (the next generation of FirefoxDriver) is turned on by default from Selenium 3. Selenium uses W3C Webdriver protocol to send requests to GeckoDriver, which translates them into a protocol named Marionette. Even if you are working with older versions of Firefox browser, Selenium 3 expects you to set path to the driver executable by the webdriver.gecko.driver.
Let us consider a test case in which we will try to automate the following scenarios in Firefox browser.
We will create our second test case in the same test suite (Demo_Test).
Step1. Right click on the 'src' folder and create a new Class File from New > Class.
Give your Class name as 'Second' and click on 'Finish' button.
Step2. Open URL: https://github.com/mozilla/geckodriver/releases in your browser and click on the appropriate version for GeckoDriver download based on the operating system you are currently working on. Here, we are downloading the 64bit version of GeckoDriver for windows.
The downloaded file would be in zipped format. Unpack the contents in a convenient directory.
Before writing the test script, let us first understand how we can initialize GeckoDriver in Selenium. There are three ways to initialize GeckoDriver:
First, we have to set the system property for Gecko Driver.
Below is the code to set gecko driver using DesiredCapabilities class.
Here is the complete code:
Gecko Driver can also be initialized using marionette property.
The code for Desired Capabilities is not required for this method.
Firefox 47 or later versions have marionette driver as a legacy system. Thus, marionette driver can be called using Firefox Options as shown below.
Step3. Now it is time to code. We have embedded comments for each block of code to explain the steps clearly.
The Eclipse code window will look like this:
Step4. Right click on the Eclipse code and select Run As > Java Application.
Step5. The output of above test script would be displayed in Firefox browser.