5 best dictionary browser extensions you should try

Matthew Adams
by Matthew Adams
Windows & Software Expert
Last update:
Affiliate Disclosure

  • Our choice of the best dictionary browser extensions integrate perfectly with the most popular search-engines.
  • With this type of tool at your fingertips the definition of any word from a web-page is literally one click away.
  • Rely on these apps to learn new specialty terms, and benefit from multiple dictionaries at once.
  • Need a versatile instant dictionary extension? see our solutions with customizable features.
tooltip dictionary
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If you’ve got a Web page open with some heavy jargon in it, it might be handy to have a good online dictionary to use. Then you can look up some of the jargon for further clarification.

There are numerous dictionary browser extensions available for the foremost search engines that provide you with a quick dictionary.

In this article, we are exploring some of the best dictionary browser extensions for Chrome, Firefox, and Opera.

Quick Tip:

Browser extensions are the bread and butter of all major browsers, allowing users to customize and improve their browsing experience.

However, they often trade privacy for the sake of versatility. Not the case with Opera. The Opera Browser, built on the Chromium project basis, allows for all extensions Google Chrome offers.

However, there are also some great extensions that you can add, such as Dictionary, ImTranslator: Translator, Dictionary, TTS, and Lingvanex – Translator and Dictionary.

The extensions can be added to Opera for free and as they are based on AI you will have a fast and accurate translation in almost 100  languages.

Opera Browser

Opera Browser

Browse the Internet freely and use any of the amazing dictionary extensions this browser has, for free!

What are the best dictionary extensions?

Google Dictionary

google dictionary extension

This is a great dictionary for web browser extension developed by Google for its Chrome browser. Consequently, the add-on integrates with the Google search engine to give you definitions.

The great thing about this extension is that you can double-click any word to look it up in the dictionary. That opens the bubble shown in the shot directly below.

This also works with foreign languages as a translation tool. Alternatively, you can click the Google Dictionary toolbar button to enter text into a dictionary search box instead. It can also save words that you look up.

Download Google Dictionary


Dictionary Pop-Up

dictionary pop-up extension

Dictionary.com is an exclusive Firefox add-on you can add to the browser from this Web page. This is pretty similar to Google Dictionary, except that it’s integrated with Dictionary.com.

As such, you can double-click words in a page to open the definition bubble shown in the snapshot directly below and then click More to open Dictionary.com.

The good thing about this add-on is that it also includes options for you to customize the pop-up bubble’s fonts with.

Download Dictionary Pop-Up


Dictionary Tooltip

dictionary tooltip extension

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Tooltip Dictionary is another great Firefox dictionary add-on that you can also add to Chrome.

Like Google Dictionary and Dictionary Pop-Up, you can double-click words on a page to look them up; or you can also select the text and press Ctrl + Shift + K to open the window directly below.

However, what really elevates this add-on above some of the others is that it enables you to look up words with multiple dictionaries.

All you need to do is click Show Dictionaries and then select alternatives from the drop-down menu.

Download Dictionary Tooltip


Instant Dictionary

This is a popup dictionary extension for Chrome integrated with GoodWordGuide.com. You can look up words by double-clicking them on the page much the same as the others.

However, you can also select the text and then press the D button to automatically enter a word in the extension’s search box.

Furthermore, the extension also includes extra configuration options for trigger keys and the font size.

Download Instant Dictionary


Dictionary Anywhere

google translate extension

This is an awesome instant dictionary extension for both Opera and Firefox. You can add it to Opera, or you can add it to Firefox.

Dictionary Anywhere enables you to select words in pages for definitions. However, unlike some of the others, it’s also a translation tool.

When you click the extension’s button, it will open the window below that provides a definition and includes translate options.

Furthermore, you can also click Search to look up the word in the Google search engine instead. In addition, it includes a Copy button that you can press to copy text to the Clipboard.

Download Dictionary Anywhere


With these dictionary tools, you can now quickly look up jargon in website pages open in Chrome, Firefox, or Opera.

Those that include translate options can also help translate pages, but there are better translation extensions available.

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