Possible issue with Chromedriver 78, Selenium can not find web element of PDF opened in Chrome

Until my google Chrome wasn’t updated to version 78 my code worked fine. I also updated the chromedriver to version 78.0.3904.70. So I am not able anymore to find WebElement with id=‘plugin’ using Selenium WebDriver and Java:

<div id="content">
<embed id="plugin" type="application/x-google-chrome-pdf" src="http://??????????/offer_printed.php?printable=yes&amp;reanudar=&amp;>

Other than that part my tests are working fine. I never had a similar issue before. I also tried to find WebElement id=‘content’ but I am receiving the same error.

WebDriverWait wait = new WebDriverWait (driver, 90);
WebElement scrollvalid = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("plugin")));

scrollvalid.sendKeys(Keys.PAGE_DOWN);                       scrollvalid.sendKeys(Keys.PAGE_DOWN);

My automation script should find the PDF element and scroll the page down. Instead, I am receiving this error: org.openqa.selenium.TimeoutException: Timed out after 90 seconds waiting for visibility of element located by By.id: plugin

Is anybody facing a similar issue? Thanks in advance.

I’ve run into the same issue.

Apparently Chrome automatically updates itself. Yesterday (Oct 29 '19) My ChromeDriver started complaining that it was not compatible with Chrome 78. I updated the driver to the 78 version. I started to get random org.openqa.selenium.NoSuchElementException exceptions when trying to find elements that I confirmed were there. The findElement[s] also work when I used breakpoints. I also tried implicit waits, with only limited success.

I tried zsbappa’s ChromeOption solution but no joy.

Google makes it hard to get old versions of Chrome, but I found version 76 at https://www.neowin.net/news/google-chrome-76-offline-installer/. Beware, the online installer installs the latest version. I reverted to the driver for 76 and all is good. All my Selenium tests are working again.

My conclusion is that the Chrome 78 and it’s associated driver has a race condition where Selenium attempts to interrogate the web page before it’s complete.