Here's an update on my Kindle Paperwhite. I still love it, but I had a problem with the browser. The browser is almost useless, but it does have some functionality, and should work. I could not find a fix on the internet or on the Amazon site, and Amazon "customer service" is totally unresponsive. I thought maybe I had to reset it, but I dreaded that, so I fooled with it until I figured it out.
When I tried to load a website (this one, actually) the Web and Google portions of the browser locked up. In other words, I could do everything except get to a webpage. Whenever I entered another URL it still tried to load the page that had failed. At the same time, I was not able to get to the browser menu. The button did nothing.
Here's the fix: Go to Settings and put it in Airplane Mode. Then go to the Home page, select the menu icon, and select "Experimental Browser." It won't do anything because the WiFi is off. Press the menu button (the three bars in the upper right-hand corner) and select "Clear History." Then go back and turn off Airplane Mode. It will reconnect to WiFi. It should work after that. Just don't try to go to the website that jammed it up in the first place, or you'll have to repeat.
Let me know if this helps.