I published a free Chrome extension：HoverWord Chinese，a mouse-pointer-Chinese-dictionary.
It works on both Mac and Windows (maybe Linix too).
To install: In Chrome, click this link:
Then click "Add to Chrome" button.
Now HoverWord is added to your Chrome as an extension.
1. Whenever you want to use it, click on the HoverWord icon on top-right corner on Chrome.'
2. When viewing any Chinese page, , mouse over on a Chinese character, then a dictionary window will pop up, together with two small buttons which can speak the word and can get more usage samples related to the word.
3. When dict window is up, use left/right arrow to see more words, if any.
4. Right click HoverWord icon on top-right corner of Chrome, you can use Options menu to set font size and opt to require SHIFT key for dictionary window to popup.
A key to language learning is extensive reading. Welcome to forward this text other people who need it. Thanks!