i thought it might be useful to be able to highlight text in when browsing the internet in chrome, so i wrote a very simple extension to do that. you can test it out on this page by holding down Ctrl or Cmd while highlighting text within a paragraph.
to get it from the chrome web store go to: https://chrome.google.com/webstore/detail/hkmohgcgjpngfeaeagmefmegmelnhpob/
to see the source, go to https://code.google.com/p/chrome-text-highliter/