Normally when you click on any Wikipedia images then it opens on the new page and to read content we have to click back button to again reload previous page, so it increased too much navigation if we are power user of Wikipedia. If you also faces same problem then why not to try Wikipedia Image Preview.
Wikipedia Image Preview is a simple chrome extension which show you a full-size preview of an image with blur text in the same page. After Installing this extension when you click on any Wikipedia images then a full-size images appeared in a light box and when you click again, you return back to the page.
Wikipedia Image Preview also give you an option to choose background color means you can select background whether to white, to black, or not at all.
Install Wikipedia Image Preview for Chrome Browser from Here