More specifically, is it safe to perform multiple operations on a single WebDriver/WebElement simultaneously? i.e. something like this
WebDriver driver; //d
This question is answered here
"WebDriver is not thread-safe. Having said that, if you can serialize access to the underlying driver instance, you can share a reference in more than one thread. This is not advisable. You /can/ on the other hand instantiate one WebDriver instance for each thread. "