Add extensions, get work done

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.

Get better search results instantly from your home and new tab page!

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.

Add subtitles to any video or movie online. Be it on Netflix, Disney+, Youtube or any other online streaming platform.

SQLite Manager

manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously

HTTP Header Live

Displays the HTTP header. Edit it and send it.

Clockify Time Tracker

Track time from anywhere on the web and improve productivity.

Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.

Add a badge to the toolbar that shows the number of currently open tabs in a window or all windows.

Pinned Google Calendar

Go to the pinned Google Calendar tab. If it doesn't exist, it's created.

The better way to job search. Quick apply and autofill job applications in one click. Track jobs, companies, contacts, resumes & more!

Sets "Always on Top" style for your Firefox window

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!

Use your locally running AI models to assist you in your web browsing.

Add accessibility auditing to the Firefox Developer Tools

Add Highlights and Notes to a Web Page

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.

Choose what video codec YouTube should play for you

Save sessions as bookmarks and access them across devices. Advanced Session Manager: edit, save, change, restore. It can also be your best Bookmark Manager

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.

Markdown Viewer with 30+ Themes, Dark Mode, MathJax, Mermaid diagrams, Syntax Highlighted code blocks

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.

For your better Twitter media experience.