Since I speak Cantonese, I learn the pronunciation for the words using one of the dictionaries - MDBG seems to be a good one for single characters, but it is missing pronunciation of many syllables.

I found that http://www.forvo.com/ seems to be a good one for the words I've tested, and gives has natural pronunciations. Please add it to the drop-down box.

Skritter also has some missing pronunciations for some words, so it would be useful even for non-Cantonese speakers.

Actually, if a shortcut button can be added for dictionary lookup, that would save time.

I keep having to press "Look up more info on this word" and wait for the pop-up to load.

Perhaps a button that opens a new tab immediately to the dictionary last selected?

Yes, a shortcut key would be wonderful!