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Preview of Dictionary Glance

Dictionary Glance by kralharlaus

Instantly look up English word definitions in-page or via a toolbar popup.

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About this extension
Dictionary Lookup (Firefox Addon)

Dictionary Lookup is a minimalist dictionary extension for Firefox.
Click any word on a webpage to get its definition instantly via a tooltip.

🔧 Features
  • Instant word lookup via context menu or tooltip.
  • Clean, classic book-style UI.
  • Works across most websites.
  • No data collection.

📦 Installation
  1. Go to Firefox Addons (link once published).
  2. Click Add to Firefox.
  3. Done!

📂 Source Code

https://github.com/kingharlaus24/Dictionary-Addon
This extension is open-source and MIT licensed.

🛠️ Development

To load the extension temporarily in Firefox:
1. Go to about:debugging
2. Click “This Firefox”
3. Click “Load Temporary Add-on”
4. Select your manifest.json file

✅ License

MIT License – do what you want, just give credit.
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Required permissions:

  • Access your data for all web sites
More information
Add-on Links
  • Homepage
Version
4.2
Size
30.41 kB
Last updated
2 months ago (17 Jun 2025)
Related Categories
  • Search Tools
  • Language Support
Licence
MIT Licence
Privacy Policy
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Version History
  • See all versions
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Release notes for 4.2
Wikipedia Integration and Definition Handling:
Added Wikipedia fallback for missing definitions
Improved handling of cases where definitions are not found
UI and Functionality Improvements:
Fixed history options definition display
Improved tooltip positioning
Added dark mode compatibility
Added copy and close buttons
Improved toolbar popup functionality
Added auto-close feature when word is scrolled out of screen
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