It would go much further for the mozilla development center to do a little basic, white-hat, on-page SEO. For example, this URL:
<a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array" rel="nofollow">https://developer.mozilla.org/en/JavaScript/Reference/Global...</a>
has a title of "Array - MDC". Even when it does come up in search results, most users wouldn't have context from the title what it's about. "MDC" adds nothing to the title. Words like "JavaScript" or "documentation" might help. Similarly, "documentation" isn't even on the page, and "Javascript" is first found halfway down the page and mostly in extra small text.<p>That said, the search results seem fine for this. [javascript array] turns up this page, albeit at position 9. It also shows w3cschools.com's page on the javascript array at the top, as well as several other great references. The only less than ideal results that I see are the two from javascript-array.com which tends to smell a little over-seo'ed from the fact that the hyphenated domain matches the query.