Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
All Downloader Professional finds links, images, videos, documents on a website an make them downloadable.
Simple tool for measuring arbitrary parts of a page. Does not and will never contain adware.
Re-enable the possibility to use the context menu on sites that overrides it
Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others.
BuiltWith is a web site profiler tool. Upon looking up a page, BuiltWith returns a list all the technologies in use on that page that it can find.
Quickly and easily capture an image of a web page. Options allow you to control output format (PNG or JPEG), file name and more.
Speed up your design workflow!
Control your browser faster and easier with gestures using mouse movement.
Hide My IP VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older Hide My IP VPN from "Version History" (https://goo.gl/7ZQQjZ)
Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller. Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.
Block Google Analytics in any website. If you are a developer and you do not want to watch your own visits on your page or you are just a web user that you do not want pages analyse you, this extension is for you.
Plugin to get the elements xPath.
Instead of completely blocking canvas fingerprinting, Canvas Defender add-on creates a unique and persistent noise that hides your real canvas fingerprint. This add-on protects you while browsing both in normal and private mode.
Capture web pages to local device or backend server for future retrieval, organization, annotation, and edit.
Zoom in or out on web content using the zoom button and mouse scroll wheel for more comfortable reading. That to each percent value. It helps you to zoom easily in and out a web page. Thanks to the slider and the zoom buttons.
EditThisCookie is a cookie manager. You can add, delete, edit, search, protect and block cookies!
A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.
Add accessibility auditing to the Firefox Developer Tools
Night Eye enables night mode on any website using new algorithm that analyses and converts all colours instead of inverting them.
Displays a sidebar that lets you to forge HTTP requests. Press Alt+Shift+Y to show the sidebar and make your own HTTP request. You can choose the method GET, HEAD, POST, OPTIONS, PUT DELETE and the body data to send. Response in the main window.
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.