Question: I'm trying to open <https://read.amazon.com> on the latest version of Tor but I get a black screen. It works fine on Tor versions below 7. I'm wondering if I tweak the browser to get the web page to open.

Any insight is appreciated.

Answer: 
It appears to be a url redirection issue. 
When I open the <https://read.amazon.com> link on Firefox, it redirects to <https://www.amazon.com/ap/signin?openid.assoc_handle=amzn_kweb&openid.return_to=https%3A%2F%2Fread.amazon.com%2F&openid.mode=checkid_setup&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&pageId=amzn_kcr> . 

The black screen in Tor Browser is as a result of this redirect not happening. I suggest you copy the [redirected url](https://www.amazon.com/ap/signin?openid.assoc_handle=amzn_kweb&openid.return_to=https%3A%2F%2Fread.amazon.com%2F&openid.mode=checkid_setup&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&pageId=amzn_kcr) and paste it into Tor. It will render seamlessly.

Here's a screenshot of the pages side-by-side; on Firefox and on Tor Browser respectively. 
[![enter image description here](https://i.stack.imgur.com/zitnM.png)](https://i.stack.imgur.com/zitnM.png)
When you say "but I get a black screen", do you mean that you get the page that says "This application requires Javascript. Please turn on Javascript in your browser's preferences/settings and try again."?
If so, you would need to enable JavaScript (which may decrease your privacy/security).
If you are OK with the risk and want to disable JavaScript on that page, you would click the NoScript button, and then on the line the says "amazon.com" on the right, you would click click the "S" on the left.

Here is a video about how to use NoScript: <https://www.youtube.com/watch?v=UhJTwCFFzrE&t=174>