If you typed in the address, check your spelling. Could just be a typo.
   If you followed a link, it’s probably broken. Please contact us and we’ll fix it.
   If you’re not sure what you’re looking for, start at mozilla.org. 

In your article Mozilla tests a built-in, secure, PDF viewer in Firefox Beta leveraging the power of HTML5 http://blog.mozilla.org/futurereleases/2013/01/11/mozilla-tests-a-built-in-secure-pdf-viewer-in-firefox-beta-leveraging-the-power-of-html5/ You say: You can try PDF.js now by downloading Firefox Beta (link) http://www.mozilla.org/en-US/firefox/beta/%22 BUT when you click on the link you get 404 Page Not Found Whoops! What are you doing here? Did you make a left at that last URL instead of a right? No problem. Unless you want us to deal you in, here are some tips to get you back on your way: If you typed in the address, check your spelling. Could just be a typo. If you followed a link, it’s probably broken. Please contact us and we’ll fix it. If you’re not sure what you’re looking for, start at mozilla.org. Then when you click on "contact us" link to try to report the broken link, it brings you here: http://www.mozilla.org/en-US/about/contact.html But THIS PAGE IS ABSOLUTELY USELESS FOR REPORTING BROKEN LINKS!!! THERE'S NOTHING AT ALL ANYWHERE ON THIS PAGE for reporting broken links. The suggestion box will not let you input an URL so you can't use it to report a broken link. There is no place on the blog to add any comments so you can't report the broken link there. The broken link on the blog isn't a software bug so you can't report it in bug reports. I searched everywhere, including the help, troubleshooting & support pages for information on reporting broken links & THERE WASN'T ANY RELEVANT INFORMATION ANYWHERE! When it says "Please contact us and we’ll fix it." THERE NEEDS TO BE SOME PROVISION MADE FOR REPORTING THE BROKEN LINK, perhaps create a special feedback form for reporting broken links that allows a user to input: The referring link (in this case it would be the link for the blog article itself) The broken link (in this case it's the Firefox Beta link given within the article) Comments (In this case, once the problem is fixed and proper provision is made for reporting broken links, there would no longer be any need for the comment about the contact us page being absolutely useless for reporting broken links!)