I use 76 and dont update it

it works fine

Thank you Ashish!

I have downgraded Firefox to 76 now.

I tried below 2 ways and running into the same issue again.

1:

System.setProperty("webdriver.gecko.driver", "C:\\Users\\rames\\OneDrive\\Documents\\Mamatha\\Selenium\\geckodriver.exe");
DesiredCapabilities capabilities=DesiredCapabilities.firefox();
capabilities.setCapability("marionette", true);
WebDriver driver = new FirefoxDriver(capabilities);
driver.get("http://www.google.com"); 

2:
WebDriver driver = new FirefoxDriver();
driver.get("http://www.google.com");