WordGloss by John
Instant definitions and pronunciation for selected words without leaving the page.
Available on Firefox for Android™Available on Firefox for Android™
Scan the QR code to open this extension in Firefox for Android
Extension Metadata
About this extension
WordGloss gives you fast, inline word definitions without interrupting your browsing.
Select a word on nearly any webpage and WordGloss opens a compact definition card with:
Clear, concise definitions
Multiple meanings when available
Human pronunciation recordings from Wiktionary/Wikimedia Commons when available
Speech synthesis as a fallback when recorded pronunciation is unavailable
Automatic language detection
Manual language selection
Support for multiple languages
Fast cached lookups
WordGloss is designed to stay out of the way: select a word, get its meaning, and continue reading without opening another tab.
What WordGloss can access:
WordGloss only reads the word you select so it can provide a definition. It may also use the webpage’s language setting to choose the appropriate dictionary.
WordGloss does NOT read or collect:
-The rest of the webpage
-Surrounding sentences or paragraphs
-Your browsing history
-Cookies or saved website data
-Passwords, account details, or form entries
-Clipboard contents
-Images, links, or downloaded files
The selected word is sent to DictionaryAPI or Wiktionary to retrieve its definition. Pronunciation audio may also be loaded from Wiktionary, Wikimedia Commons, or another listed audio provider.
WordGloss does not contain advertising, analytics, or tracking.
Select a word on nearly any webpage and WordGloss opens a compact definition card with:
Clear, concise definitions
Multiple meanings when available
Human pronunciation recordings from Wiktionary/Wikimedia Commons when available
Speech synthesis as a fallback when recorded pronunciation is unavailable
Automatic language detection
Manual language selection
Support for multiple languages
Fast cached lookups
WordGloss is designed to stay out of the way: select a word, get its meaning, and continue reading without opening another tab.
What WordGloss can access:
WordGloss only reads the word you select so it can provide a definition. It may also use the webpage’s language setting to choose the appropriate dictionary.
WordGloss does NOT read or collect:
-The rest of the webpage
-Surrounding sentences or paragraphs
-Your browsing history
-Cookies or saved website data
-Passwords, account details, or form entries
-Clipboard contents
-Images, links, or downloaded files
The selected word is sent to DictionaryAPI or Wiktionary to retrieve its definition. Pronunciation audio may also be loaded from Wiktionary, Wikimedia Commons, or another listed audio provider.
WordGloss does not contain advertising, analytics, or tracking.
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Permissions and data
Required permissions:
- Access your data for all websites
Optional permissions:
- Access your data for api.dictionaryapi.dev
- Access your data for en.wiktionary.org
- Access your data for upload.wikimedia.org
- Access your data for ssl.gstatic.com
Required data collection, according to the developer:
- Website content
More information
- Add-on Links
- Version
- 2.0.5
- Size
- 26.71 KB
- Last updated
- 6 days ago (Aug 10, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection