Allow looking up text by selecting it?

[birtles]

From a Chrome Web Store review:

It would be nice to be able to select an expression in Japanese in text and see the matching items for that instead of what the mouse is over. That would help avoid mistakes when guessing what to select (for example in 日本語基本文法辞典 it incorrectly selects 基本文 instead of 基本). It could either be an alternative to "search on hover" selectable in the settings, or selecting text could simply always take precedence over "search on hover" whenever any text is selected.

I'm not sure quite how this should work. Would it would be annoying if the popup showed up any time you selected Japanese text?