Best Firefox Addons 2025 - Top Extensions by Category

Looking to supercharge your Firefox experience in 2025? You're in the right place. Whether you're after speed, privacy, productivity, or just a smoother browsing ride, there's an add-on that fits your needs. Firefox remains one of the most flexible browsers, thanks to its rich ecosystem of extensions. With just a few clicks, you can block ads, manage tabs, enhance media playback, or save money while shopping.

This year brings a fresh wave of powerful and creative tools for every kind of user. Want to stop trackers dead in their tracks? There’s an add-on for that. Need help staying focused while working remotely? We've got that covered too. From developers and designers to casual shoppers and binge-watchers, Firefox extensions cater to all.

Gone are the days of endlessly switching between tools and tabs—most of what you need can now live right inside your browser. Discover tools that automate, protect, and simplify everything you do online. You’ll even find some hidden gems that can save you money, protect your data, and boost your creativity.

Privacy lovers will appreciate how some of these tools give them back control. Power users will love the endless customization possibilities. Even if you only use a few tabs or watch the occasional YouTube video, there’s something here for you.

Some extensions work quietly in the background while others change your entire workflow. And yes, they’re all free to install and easy to manage. No matter what your goals are online this year, you’ll find new ways to browse smarter, faster, and safer.

So grab your favorite cup of coffee, scroll through each category, and get ready to discover your next must-have Firefox add-on. This is your ultimate guide to the best Firefox extensions of 2025.

Privacy & Security

uBlock Origin

Efficient ad blocker that enhances browsing speed and privacy by filtering out unwanted content.

Privacy Badger

Blocks invisible trackers automatically to protect your browsing privacy.

NoScript

Controls executable content like JavaScript to prevent potential security exploits.

Cookie AutoDelete

Deletes unused cookies automatically when you close browser tabs, keeping your sessions private.

Facebook Container

Isolates Facebook activities, preventing cross-site tracking.

DuckDuckGo Privacy Essentials

Blocks trackers and enforces secure connections to enhance browsing privacy.

HTTPS Everywhere

Ensures websites use secure HTTPS connections for better data protection.

Decentraleyes

Reduces tracking by locally hosting common web libraries, eliminating third-party requests.

Smart Referer

Prevents leaking browsing history by controlling HTTP Referer headers.

Bitwarden

Secure password manager that safely stores and autofills credentials.

Productivity

Grammarly for Firefox

Real-time grammar checker for improved writing clarity and correctness.

Pocket

Save content for later viewing offline or online, organizing articles and videos.

LeechBlock NG

Blocks distracting websites to maintain productivity and focus.

Clockify

Tracks and manages time spent on tasks directly from the browser.

Todoist

Task manager to organize daily to-do lists and project tasks.

Evernote Web Clipper

Captures web content like articles and PDFs directly into Evernote.

OneTab

Consolidates tabs into a list, freeing memory and reducing clutter.

Tab Session Manager

Saves and restores browsing sessions to efficiently manage work projects.

Tomato Clock

Implements the Pomodoro technique for structured work and breaks.

Nimbus Screenshot & Screen Video Recorder

Captures screenshots and videos directly from your browser window.

Shopping & Coupons

Honey

Automatically finds coupons and applies discounts during online checkout.

Rakuten (Ebates)

Earn cashback when shopping at participating online stores.

Camelizer

Tracks Amazon product prices to help determine optimal purchasing times.

Keepa

Detailed price tracking and alerts for products on Amazon.

InvisibleHand

Alerts you to lower prices elsewhere when shopping online.

PriceBlink

Price comparison and coupon finder across various online stores.

RetailMeNot Deal Finder

Automatically applies best coupons during online shopping checkout.

Amazon Assistant

Helps compare products and prices while browsing non-Amazon sites.

Offers.com

Aggregates online deals and coupons from multiple sources.

CouponBirds SmartCoupon Finder

Detects and applies coupon codes automatically for online purchases.

Web Development & Design

Web Developer

Collection of web development tools for debugging and inspecting pages.

ColorZilla

Advanced color picker for web designers and developers.

Firebug

Live edit and debug CSS, HTML, JavaScript on webpages directly.

Greasemonkey

Customize webpage behavior using custom JavaScript scripts.

SEOquake

SEO analysis and metrics tool directly integrated into the browser.

Wappalyzer

Identifies web technologies (CMS, frameworks) used by websites.

Page Performance Test

Analyzes page load speeds with recommendations for optimization.

User-Agent Switcher

Tests websites by simulating various browser and device types.

Font Finder

Identifies fonts and detailed font information on web pages.

Window Resizer

Emulates various screen resolutions to test responsive designs.

Tab & Session Management

Tree Style Tab

Organizes tabs vertically in a tree structure for easy navigation.

Simple Tab Groups

Groups tabs into collections, simplifying workspace management.

Tab Mix Plus

Enhances tab functionality with options like duplication and advanced control.

OneTab

Consolidates tabs into a simple list to manage memory and reduce clutter.

Tab Session Manager

Saves and restores browsing sessions effectively.

Tabby

Quick tab navigation using a searchable tab list.

Workona

Organizes tabs into workspaces, ideal for multitasking across projects.

Session Buddy

Manages browser sessions, saving and restoring tabs as needed.

Tab Stash

Temporarily stashes tabs, keeping your active workspace tidy.

Tabli

Simplified vertical listing of tabs, aiding quick navigation.

Media & Download Tools

Video DownloadHelper

Downloads videos and images easily from various websites.

Enhancer for YouTube

Customizes YouTube playback, including speed and viewing mode.

Turn Off the Lights

Dims webpage surroundings to improve video viewing focus.

Magic Actions for YouTube

Enhances YouTube features, such as automatic HD playback and cinema mode.

Download Star

Powerful tool for bulk file downloads from websites.

Flash Video Downloader

Quickly download videos from flash-based websites.

Audio Downloader Prime

Download audio content from webpages effortlessly.

Video Downloader Professional

Easy video downloads from multiple websites.

Ant Video Downloader

Versatile tool for downloading and converting videos from various sites.

SaveFrom.net Helper

Efficiently downloads media files from popular platforms including YouTube and Facebook.