Selenium WebDriver Multi-Threading & Browser Hiding using Java

I'm using the 开发者_开发知识库Java API of the Selenium WebDriver:

1. Is it possible to create multiple instances of the Selenium WebDriver from different threads simultaneously without conflict?

2. How do I change the path of the firefox installation directory that WebDriver uses if I installed firefox in a different directory?

3. How can I hide all the instances of the browsers(e.g firefox) that those threads started?

Thank you.

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I can give you an answer to your first question.

Yes, you can run multiple driver instances simultaneously. However it is not recommended to run more than 5 or so instances at once in a single selenium server. Selenium Grid was designed specifically for this (it is bundled with the Selenium Server).