Earlier quoted context omitted.
Wait, 'one-click'? In Firefox if I click the dropdown on the search field, then click 'Manage Search Engines' I get a dialog in which can be found a link to 'Get more search engines...'. Clicking that opens an add-ons store tab with the 'Search Tools' filter applied, none of whose above-the-fold suggestions has anything to do with DDG. That's not one-click, it's a runaround. In contrast, Chrome automatically adds sea…
To see the difference go to my search engine http://www.verticalset.com/search On Firefox, by clicking "Add to Browser" and checking "Start using Right Away", you can make it default. On Chrome, if you click on same button there is no way to make it default. You have to find the list of search engines in settings and click "Make Default". On IE, process is similar to Firefox. It wouldn't be hard to make this similar…
If you really want to tell people how to add your site as their default, then detect Chrome users and tell them how to do it in Chrome. There is no need to blame Google for this - they aren't treating you differently than anyone else, aside from Bing and Yahoo (who are added to the default list).
While I appreciate that other sites are doing this by default without user interaction, this is just ripe for a phishing attack. So, I would assume this will go away soon.