Please install the extensions (add-ons) Rikaikun for Chrome and Rikaichamp for Firefox, so you can hover over Japanese text written with Kanji and see its reading and meaning in real time.
Rikaikun (Chrome)
https://chrome.google.com/webstore/detail/rikaikun/jipdnfibhldikgcjhfnomkfpcebammhp
Rikaichamp (Firefox)
https://addons.mozilla.org/en-US/firefox/addon/rikaichamp/