How to disabled print preview in Firefox browser with selenium java

Question

I'm trying to cancel out of the print dialog for Firefox browser using selenium java and unable to find an answer to this question. I have looked into Firefox capabilities and did not find anything related to print preview. I have also tried using SendKeys with window handles and it failed and did not work. Im all out of ideas

Any help would be greatly appreciated.

Have you already tried "print.always_print_silent" parameter? — Anubhav Sharma
– Anubhav Sharma, Commented Nov 22, 2024 at 3:25
I have not. Do you have an example of the use case? I can give it a try — Compass55
– Compass55, Commented Nov 22, 2024 at 16:17
I need to add some tests on the page that shows up before the print preview dialog is displayed because that page was showing up as blank. It does not print it just sits there waiting for a response and I cannot click on buttons using selenium — Compass55
– Compass55, Commented Nov 22, 2024 at 18:30

Anubhav Sharma · Accepted Answer · 2024-11-24 16:26:27Z

1

I can think of two ways to achieve this.

Use print.always_print_silent flag

WebDriverManager.firefoxdriver().setup();
FirefoxOptions options = new FirefoxOptions();
options.addPreference("print.always_print_silent", true);
options.addPreference("print.printer_Microsoft_Print_to_PDF.print_to_file", true);
WebDriver driver = new FirefoxDriver(options);
driver.get("http://localhost:3000");
JavascriptExecutor jsExecutor = (JavascriptExecutor) driver;
jsExecutor.executeScript("window.print();");

Another way can be to use TakeScreenshot from selenium.

File screenshot = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);

First get width and height

JavascriptExecutor js = (JavascriptExecutor) driver;
int totalHeight = ((Number) js.executeScript("return document.body.scrollHeight")).intValue();
int viewportHeight = ((Number) js.executeScript("return window.innerHeight")).intValue();

use javascript to keep scrolling and keep taking snaps.

int scrollPosition = 0;
List<File> screenshots = new ArrayList<>();
while (scrollPosition < totalHeight) {
    File screenshot = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
    screenshots.add(screenshot);
    scrollPosition += viewportHeight;
    js.executeScript("window.scrollBy(0, arguments[0]);", viewportHeight);
    Thread.sleep(1000); // sleep to handle load time
}

This way you will have the snaps in form of PNG, you can then use any PDF library (e.g. PDFBox) to add the images to pdf and save it as a file.

You can refer Java: Create PDF pages from images using PDFBox 1 library for the task.

edited Nov 24, 2024 at 16:26

answered Nov 22, 2024 at 17:34

Anubhav Sharma

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4 Comments

Compass55 Over a year ago

Thank you the "silent printing" did the job the print save dialog is annoying but not a deal breaker the test is still able to continue and pass. I will take that as acceptable.

Compass55 Over a year ago

So I enhanced your code. I found other user who posted additional preferences. So if you add this 2nd preference"MS_Print_to_PDF" it will hide the save file dialog box: FirefoxOptions ffOptions = new FirefoxOptions(); ffOptions.addPreference("print.always_print_silent", true); ffOptions.addPreference("print.printer_Microsoft_Print_to_PDF.print_to_file", true); driver = new FirefoxDriver(ffOptions); Thank again

JeffC Over a year ago

@user3329818 Did this answer your question? If so accept the answer.

Anubhav Sharma Over a year ago

I will update the answer to cover the additional details which @user3329818 mentioned for someone who comes later with the same problem.

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