English (US) Dictionary Firefox

English (US) Dictionary

By: flod
English (US) dictionary based on the official Mozilla dictionary.

Features & Capabilities

The English (US) Dictionary Chrome extension repackages the official en-US dictionary from Mozilla's central repositories. It is built upon the SCOWL word list (size 60) and integrated with over 6,000 additional words contributed by Mozilla, ensuring comprehensive and accurate spell checking.

This extension is ideal for users seeking reliable American English spell checking support on the web. For guidance on using dictionaries in Firefox, please refer to Mozilla's support article. Additionally, there is a transparent process for reporting bugs and requesting new words to be added to the dictionary, facilitating continuous improvement and user involvement.

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
flod
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/english-us-dictionary/
Website:
https://github.com/flodolo/dictionary-en-us

User Reviews

User feedback is mixed: multiple reviewers call the add-on useful and say it works, while others report it doesn’t appear or function after installation. A common theme is user confusion about how to enable or find the dictionary and frustration that documentation or guidance is lacking, which fuels negative reviews.
Pros
  • Provides an English (US) dictionary pack — many users find it useful/essential.
  • Reported to work correctly for a number of users.
  • Installs as a simple dictionary add-on (no complex features).
Cons
  • Some users report it does not work or call it a scam.
  • Installation/visibility confusion — some users cannot find or enable the dictionary after installing.
  • Lack of clear instructions/documentation leads to users blaming the developer.
Recent reviews
by ma*****, 2026-05-22

by Jo*****, 2026-04-05

by *****, 2025-08-17
View all user reviews ›

Is English (US) Dictionary Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

English (US) Dictionary does not require any sensitive permissions.

Risk impact analysis details
  • Low This permission has no access or impact on the user's system or data, thus carrying no risk.
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

English (US) Dictionary has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best English (US) Dictionary Alternatives

Here are some Firefox add-ons that are similar to English (US) Dictionary: