Safari not showing mobile web pages...

Some how Safari on my iphone 5 is showing all websites like they would be on a PC... not the mobile version. Any idea how that happened?

Actually... Mercury browser is doing this also. How'd that happen? I can't get anything to display as the mobile site.

 

I've looked for that and haven't found one. Safari opens to the mobile search page but when I enter a search term it opens the same search site in full browser form. Just started doing this a week or so ago. Can't figure out what I did or what updated that might have done this.

 

Here's what I get when I click on an item in the amazon.com app...

 

That is weird. A bunch of different web sites are not detecting my mobile device.

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Got it. Safari Downloader + was doing it....