NHK News Easy
NHK News Easy is a great site for improving your reading skill. It is written in plain Japanese with furigana.
If you add the link below as a bookmark in Chrome (it may work in other browsers - I do not know for sure) and run it while on an NHKEasy page (it also works with some other sites), it will hide the furigana until you hover over the word. I use this to force me to read what I can but I can still hover if I don't know a word OR just want to confirm I got it right.
Some more detailed directions:
Right-Click on the toolbar and select bookmark manager
Open the folder you want the bookmark in (in my case I put it in the "Bookmarks Bar"
In the top-right, click ... and then "Add a new bookmark"
Put in any name you want ("Hide furigana" for example)
For URL, cut and paste the thing above
Visit an NHKEasy page
Click your "Hide furigana" bookmark and the furigana should disappear until you hover over a word with the mouse