Iron really doesn't provide any advantage over Chrome with regard to privacy.
Finally, somebody who not just posts FUD but actually investigates. After reading parent's article though, I get the feeling that Iron does actually do exactly what it claims to do: improve the user's privacy by changing default settings that 99% of Chrome users never even heard about, let alone change them to appropriate values. Specifically the changes mentioned are:
privacy related:
- disables the Google suggestion service (which informs Google about what you're typing into the search bar before you trigger the search)
- disables a service called GoogleURLTracker (which informs Google about your location, so it can "localise" you)
- Chromium's built-in statistics recording and reporting functionality is shut off
- the Client ID of the browser is wiped out
- disables Google's alternate error pages (that invokes another Google service, that isn't really required for web browsing)
- disables a web resource service used to fetch new help tips for Chromium (another service that "phones home" is disabled)
other:
- changes the Chromium version number from 5.0.306 to 4.0.280 (Iron version number)
- number of thumbnails in the New Tab page is increased from 8 to 12
- number of days of history used to compile that data is increased from 90 to 180
- Chromium tips that are shown on the New Tab page to help users learn how to use Chromium are disabled
- dialog that Chromium shows new users when it is first run is disabled
To recap, this article headlines "Is Iron a Scam? Yes" actually lists Iron's diffs from the Chromium project (which btw is only the codebase for Chrome, which itself is not open source, thus we have no way to ascertain what the Chrome browser is actually doing in the background). These diffs contains modifications that ensure that most of the default behaviours of Chromium that "phone home" are disabled and can not be enabled through the options menu.
So no matter what kind of douchebags the developer(s) may be, they are actually delivering on what they promise - a browser that disables phoning home features. Again: these features can be disabled through Chromium's options menu, but most people won't because they don't know about them.
Furthermore they are doing this while also releasing their source code for everyone to see (and compile) so we not only see what changes they make to the privacy settings, but can also make sure they are not adding questionable features themselves. In any case, if you wanted to fork your own personalised "privacy enabled" browser from the Chromium project it looks as if forking from the Iron source will save you some work.