axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
9,499 users
Page Assist - A Web UI for Local AI Models
Use your locally running AI models to assist you in your web browsing.
9,382 users
SQLite Manager
manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously
9,355 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!
9,115 users
Tab Counter
Add a badge to the toolbar that shows the number of currently open tabs in a window or all windows.
9,062 users
Sponsored Search by SearchesCentral
Get better search results instantly from your home and new tab page!
9,052 users
Ignore X-Frame-Options Header
Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.
9,038 users
Pinned Google Calendar
Go to the pinned Google Calendar tab. If it doesn't exist, it's created.
9,001 users
Markdown Viewer
Markdown Viewer with 30+ Themes, Dark Mode, MathJax, Mermaid diagrams, Syntax Highlighted code blocks
8,711 users
Breez ClickOnce
Breez ClickOnce enables ClickOnce support in Mozilla Firefox. It is required to be able to launch any Windows Forms or Windows Presentation Foundation application that is based on Microsoft's ClickOnce technology.
8,641 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.
8,182 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.
8,099 users
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.
7,972 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.
7,950 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.
7,926 users
D.Bridge 2
D.Bridge 2 extension enables by using Native Messaging protocol integration of web pages of various Slovak public sector bodies with D.Launcher 2 application by DITEC, a.s.
7,916 users
