It is not possible.
Selenium CSS Selectors do not support locating elements based on their text content.
See this or this or other similar questions about that.

The main problem is at this line:

driver.findElement(By.cssSelector("a:contains('About Google')"));

css doesn't maintain contains() for Selenium WD - See here.

For using contains() you have to use Xpath.

With Xpath your locator will be:

//a[contains(text(), 'About Google')]

and for driver it will be as:

driver.findElement(By.xpath("//a[contains(text(), 'About Google')]"));

For finding links with Selenium you can use:

driver.findElement(By.linkText("your link name here"));

It is limitation of CSS selectors compare to Xpath:

• you can't take parent element with CSS selectors (Xpath has XPath axes)
• you can't use contains (it is only XPath privilege).

BTW
For processing Xpath locators from page you able to use extension for Firefox browser:

• FirePath

• Xpath Checker

No, css_selector for Selenium still doesn't supports :contains("text") method.

You can find a couple of detailed discussions in:

• selenium.common.exceptions.InvalidSelectorException with "span:contains('string')"
• Finding link using text in CSS Selector is not working

css=a[text='Log Out'] or a[innertext='Log Out']

Can you please try this one out?

Or if that doesn't work and you still don't want to use xpath because it's slow, you can always try: link=Log Out. That's still better then xpath.

EDIT:

So i found a possible solution for you mate. If you are trying to find an exact String you could always use Regular expression like this:

css=div:contains("^ab$") 

Just replace div with a and there you go. This will find ONLY AB in whatever text div it looks for. OFC if you have more then one links with text AB (which is a bad thing :P ) then it will find them all..

Try this and see if it helps. :)

You can just use .text

installations = browser.find_elements_by_css_selector('p.machine-name.install-info-entry.x-hidden-focus') 

for installation in installations: 
  print(installation.text)  

Note that installations is a list of web elements, whereas installation is just a web element from the list.

UPDATE1:

If you want to extract the attribute from a web element, then you can follow this code:

print(installation.get_attribute("attribute name"))  

You should pass your desired attribute name in get_attribute method.

You can read innerHTML attribute to get source of the content of the element or outerHTML for source with the current element.

installation.get_attribute('innerHTML')

Hope this will be helpful.