Avast Online Security & Privacy
Secure your Mozilla Firefox browser against real-time online threats, trackers, and scams. We’ll check every site you visit, from Facebook to your bank, so nothing puts you or your data at risk. Join a growing community of 400 million Avast users.
10,364 users
Sponsored Search by SearchesCentral
Get better search results instantly from your home and new tab page!
10,293 users
Simple mass downloader
A simple but powerful mass downloader. Download links from multiple tabs at once, from the clipboard or selected text on web pages. Advanced filtering or multi-renaming options. User-defined automatic download folders.
10,104 users
Substital
Add subtitles to any video or movie online. Be it on Netflix, Disney+, Youtube or any other online streaming platform.
9,910 users
SQLite Manager
manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously
9,910 users
Remove Youtube Shorts
Remove Youtube Shorts tab in navigation tab, and redirect Youtube Shorts Videos to original Youtube video player, for better experience on desktop.
9,875 users
Ignore X-Frame-Options Header
Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.
9,369 users
Tab Counter
Add a badge to the toolbar that shows the number of currently open tabs in a window or all windows.
9,230 users
Pinned Google Calendar
Go to the pinned Google Calendar tab. If it doesn't exist, it's created.
9,199 users
Simplify Copilot – Autofill job applications
The better way to job search. Quick apply and autofill job applications in one click. Track jobs, companies, contacts, resumes & more!
9,113 users
Channel Blocker
Are you annoyed by YouTube™s video recommendations? Our Add-on enables the function of blocking anything you'd like. Block separate videos, users or whole channels with only one click!
9,050 users
Page Assist - A Web UI for Local AI Models
Use your locally running AI models to assist you in your web browsing.
9,028 users
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
8,958 users
Bulk Image Downloader
Integrates Bulk Image Downloader (a Windows only app that must be installed separately) with FireFox. Download full sized images from almost any thumbnailed web gallery. Supports most popular image hosts such as imagevenue, imagefap, flickr, etc.
8,500 users
Session Sync
Save sessions as bookmarks and access them across devices. Advanced Session Manager: edit, save, change, restore. It can also be your best Bookmark Manager
8,328 users
Easy Youtube Video Downloader
No# 1 Rated Youtube Video Downloader for firefox web-browser with MP3 and Full-HD downloads. Instant, one-click Youtube video downloader with high-quality 256Kbps/128Kbps MP3 and Full-HD video downloading options.
8,274 users
Html Validator
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.
8,224 users
Markdown Viewer
Markdown Viewer with 30+ Themes, Dark Mode, MathJax, Mermaid diagrams, Syntax Highlighted code blocks
8,168 users
Ant Download Manager
antFF is Ant Download Manager software integration module for Windows platforms. For everyone who thinks that we are the same as is Ant Video Downloader - we are not Ant Video Downloader, we are another software, we are another group of developers.
8,074 users