By: ttWebExtensions
This simple extension helps you define the words in fewer clicks and no typing.
Steps:
1 - Highlight the text.
2 - Right click the highlighted text.
3 - Choose one of two dictionaries websites (dictionary.com or urbandictionary.com)
User Growth & Download Statistics
Manifest V2 Add-on
- By:
- ttWebExtensions
- Daily users:
- 20
- Rating:
- 5.00 (2)
- Version:
- 1.0 Last updated: 2020-12-17
- Version code:
- 5151323
- Creation date:
- 2020-12-17
- Risk:
- Very low risk impact Low risk likelihood
- Permissions:
- Size:
- 15.37KB
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-15
- Compare stats and ranking:
- RightClickDefine vs QuickDefine
- RightClickDefine vs Dictionaries At Hand
- RightClickDefine vs Dictionary Redefined
Ranking
For Developers
Contact the developer
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User Reviews
I first looked at the very popular "Definer" extension, never installed it though, downloaded the xpi source code instead (minified ofc) and did not feel comfortable whatsoever installing it, not in the slightest. The amount of URLs in there,
❯ rg -Po '(https?://([^\s"\'<>()$$$${}|`^]|\[[^\]])*[^\s"\'<>()$$$${}|`^.,;:!?])' | perl -pE 's/[^:]+:(http.*)/\1/g' | uniq | wc -l
587
That's how many unique URLs are present in the *other* extension.
Not to mention the amount of times "telemetry" appeared
❯ rg telemetry -o | wc -l
46
Even bitly links (???)
❯ rg bit.ly -o | wc -l
7
No thanks.
Meanwhile, I looked at this extension's source code, and it's so dead simple I love it, I didn't even need to scroll to read the source code!
I literally just got tired of looking up words in scientific journals every 10 seconds, and wanted to just right click the damn word and look it up.
Doesn't have to be a fancy floating popup either, the fact that this extension just literally sends you to a dictionary.com site definition in a new tab, without wasting time on over-engineering the act of looking up a word's definition, is refreshing.
Could even say it adheres to the Unix philosophy! Do one thing, and do it well!
This is literally all I needed.
I wasted an hour or two digging through "Definer's" source code (190 files btw, 18 MiB uncompressed!!!)
Then I just said, hey you know I should scroll a little further down the extension store, maybe someone made a dead simple extension. It turns out, someone made a dead simple extension.
5/5 for not trying to knock on a door with a questionable sledgehammer
by Ps*****, 2026-02-15
This is a very simple animal.
1. Idiot proof to install
2. Idiot proof to use
Easy breezy, works exactly like it says here. Simply select the full word, right click and you will see both dictionaries from there pick one or the other.
Great design. Simple and straight forward. Very helpful and will increase my productivity.
Six ****** stars out of five!
by ja*****, 2022-05-17
Is RightClickDefine 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.
RightClickDefine does not require any sensitive permissions.
Risk impact analysis details
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.
RightClickDefine has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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