Grammarly For Firefox: A Step-By-Step Guide

Grammarly For Firefox

I am writing this blog for people who want to use Grammarly in Firefox.

Do you know that Firefox already has a spell-checker? But Grammarly is not just a spell-checker; it goes above and beyond to make writing highly effective. 

Grammarly is one of the best grammar checkers and spelling checkers. This platform’s features provide real-time grammar and spelling suggestions on websites and enhance clarity and professionalism in online writing. 

Grammarly checks different content aspects like Correctness, Clarity, Engagement, Delivery, and Style Guide. I set goals on Grammarly and ensure my content’s readability score is good. You can also use this platform to improve web writing with Grammarly. 

In this guide, I will provide all the information about how to use Grammarly on Firefox. Let’s dive right into it!!!

How To Install Grammarly In Firefox?

Learn how to install Grammarly in Firefox, and enable Grammarly for Firefox add-on with the given steps below:

Grammarly For FireFox

Step 1: Open Mozilla Firefox on your computer.

Step 2: Visit the Official Mozilla Firefox Website.

Step 3: Navigate to the add-ons page store of Firefox.

Step 4: Search for Grammarly among all the available options.

Step 5: Click on the “Add to Firefox“.

Grammarly Add To extension

Step 6: Wait for the download and installation to finish up.

Step 7: Follow the instructions and allow permissions needed.

Step 8: Look for the Grammarly icon in your browser window and click on it.

Step 9: Click the “Activate Grammarly” button to activate Grammarly for Firefox functionality.

Step 10: Sign up or log in for Grammarly.

Now, you can easily check grammar in Firefox with Grammarly. Write something within Firefox, and follow Grammarly’s suggestions to correct mistakes and enhance the overall quality of your writing.

Quick Features of Grammarly for Firefox Extension

I have been using Grammarly for Firefox for a long time. Let me share some essential Grammarly features for the Firefox extension:

Easy-to-Use Extension

Installing the Grammarly extension for Firefox is an easy task. After adding Grammarly to my browser, I could easily spot its icon on the toolbar.

It’s easy to identify mistakes and follow real-time suggestions to improve the content quality. 


Grammarly handles grammar, spelling, punctuation, sentence structure, and style. It also helps to customize Grammarly settings for Firefox web browsers. 

Online Assistance

Grammarly can be used everywhere, like social media, emails, comment sections, Google Docs, and more. I trust Grammarly as my proofreader, making sure my writing is top-notch.

User-Controlled Corrections

Grammarly flags issues in the text using different colors. Hovering over these words provides suggestions I can consider.

If a suggestion fits, I click to replace the text. If I’m confident in my wording, I can skip that suggestion. Also, you can add it to my dictionary, teaching Grammarly my style.

Detailed Writing Analysis

The “Correct with Grammarly” option opens a new window with detailed stats on word count and other issues. Grammarly also provides a plagiarism detector for checking originality.

Using Grammarly in Firefox Browser

You can easily use Grammarly with Firefox forums and comments. Below, I am sharing a short and simple guide on using Grammarly in Firefox Browser:

Grammar Checking Made Easy

Once Grammarly is installed, a button appears in the top toolbar. You need to sign up with a free Grammarly for Firefox users.

Or you can choose to go with the premium Grammarly account. The suggestions are highlighted with colorful underlines.

Interactive Tips and Corrections

If you hover over underlined words, you will see the suggestion on the right side of the document.

I can also skip the unnecessary corrections, ensuring I do not change the meaning or intent of my text. 

A small circle in the bottom right corner of the text box keeps me informed about the number of spelling errors, using color to indicate the overall “score” of my writing. 

Document Upload and Saving

I prefer typing directly on websites and using Grammarly to upload documents or copy and paste articles for analysis.

This feature, combined with automatic document saving, ensures I can revisit my work later.

Premium Features for Enhanced Writing

A subscription is necessary to unlock the plagiarism checker and other Grammarly Premium benefits for Firefox.

You can opt for the annual plan at $144, proving cost-effective for those committed to long-term usage. 

Investing in Grammarly Premium has proven invaluable for my content marketing agency, where we produce over 300 articles monthly.

You get Grammarly’s advanced suggestions for better online content, plagiarism checks, and vocabulary suggestions in Firefox. It is one of the best for online communication. 

Premium unlocks essential features like Microsoft Office integration, plagiarism detection, vocabulary enhancements, and additional checks for readability and genre-specific writing improvements.

Advanced Grammar and Style Suggestions

Grammarly Premium goes beyond basic grammar checks. It suggests missing commas, identifies opportunities to fix passive voice, and enhances clarity.

The ability to specify my language preferences ensures Grammarly understands my unique writing style.

If you own a website, Grammarly can improve website SEO with Grammarly’s clarity suggestions. You can also use Grammarly Premium features in Firefox, like tone detection.

Personalized Recommendations Popup

Clicking the Grammarly button at the bottom of my text box opens a popup with all the suggestions.

Here, I can review and either accept or ignore the recommendations. Grammarly explains each grammar rule, contributing to my continuous writing improvement.

Plagiarism Checker

Grammarly’s plagiarism checker is a must-have for writers, teachers, editors, and professionals. It’s important to check the authenticity of my academic work.

The feature identifies matches and provides details like the name and URL of similar content.

How do you fix common issues with the Grammarly Firefox extension?

I have hardly faced any issues while using the Grammarly Firefox extension. However, some specific common issues might occur.

Let me tell you how to fix Grammarly not working in Firefox: 

Missing Grammarly Icon in Toolbar

Follow the below-mentioned steps if you don’t see the Grammarly icon in your browser toolbar:

  1. Go to the Firefox menu.
  2. Check if the Grammarly extension is turned on.
  3. If not, toggle it on.
  4. Refresh the page or restart your computer for the changes to take effect.

Grammarly Not Fixing Text on Specific Websites

In case some websites are not allowing Grammarly to fix content on their website, then do the following:

  1. Test Grammarly on a different website or browser like Google Chrome to identify if the problem is site-specific. 
  2. Check for compatibility issues. 
  3. Ensure your Grammarly Extension is updated to the latest version. 

The Grammarly Panel Displays a Connection Error

To fix the issue of connection error on the Grammarly Panel display, follow the given instructions: 

  1. Verify your internet connection because Grammarly operates online.
  2. If connectivity is stable and the problem persists, consider removing and reinstalling the Grammarly Firefox plugin.

If you are still facing issues and want to know how to fix Grammarly, you are not showing suggestions in Firefox. 


In the end, Grammarly for Firefox is a helpful tool for anyone looking to improve writing and avoid common grammar mistakes. Overall, it helped me boost my confidence in web communication. 

Grammarly gives suggestions as you write and fixes spelling, grammar, punctuation, and style errors. It also actively looks for mistakes to help improve your work’s clarity and overall quality.

Grammarly for Firefox is useful for all kinds of writers, providing personalized tips, checking documents, and helping you create your own word lists.

Whether you’re writing an email, posting on social media, or working on a school assignment, Grammarly for Firefox can assist you in expressing your ideas more effectively. Contact Grammarly’s support to fix Grammarly not working in Firefox. If the issue persists, you can check for Alternatives to Grammarly for Firefox grammar checking.

Frequently Asked Questions

Is Grammarly free for Firefox use?

Yes, Grammarly provides a free extension designed for users of the Firefox web browser. This extension allows users to integrate Grammarly’s grammar and writing assistance features into their online activities, enhancing their writing experience across various platforms and text fields.

Can Grammarly check grammar in social media posts on Firefox?

Yes, Grammarly can check grammar in social media posts on the Firefox browser – the Grammarly extension functions within text fields on various websites, including popular social media platforms.

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