Ginger allows you to review the definition of certain words.
Double click a word and you will be able to see its definition (See here)
To disable this feature, follow these steps:
1. Locate and click on Ginger's extension 'G' icon, located near the address bar (See here)
2. Turn off the 'Display pop-up definitions when double-clicking a word" (See here)
3. To enable the pop-up definition feature back, just click on the slider to activate.