Lexicon (Instant Dictionary) by ak

Lexicon extension for Firefox makes reading a breeze! No more interruptions to search for word meanings. Double-click any word and instantly view its definition in a pop-up bubble. Stay focused on what you're reading and expand your vocabulary effortlessly. Supports Spanish, German, French, English, and HIndi.

To manage the extension and view personal dictionary click on the toolbar icon.

Features:

• Instant word definition
• Customizable trigger
  • Only Double Click
  • Ctrl + Double Click
  • Alt + Double Click
  • Shift + Double Click
  • Hightlight and Right Click
• Multiple Definitions Upto 5
• Word history
• Pronunciation Support
• Download word history as JSON
• Multilingual support
  • English
  • French
  • German
  • Spanish
  • Hindi
• Dark Mode
• Fast and lightweight

If you are using Firefox version 62 and below, Enable dom.webcomponents.shadowdom.enabled in about:config for the extension to work.



Extension does not work in reader mode and pdf because content scripts are not allowed to operate.