Mozilla Firefox Plugins, Add-ons and extension Page 39 of 75

Vim Vixen is a Firefox add-on which allows you to navigate with the keyboard on the browser. Firefox started to support WebExtensions API and will stop supporting add-ons using legacy APIs from version 57. For this reason, many legacy add-ons do not work on Firefox 57.

Quotebacks makes it easy to reference content and create dialogue with other sites by turning snippets of text into elegant, self-contained blockquote components.

Quickly detect who is hosting any site on the web. Enter a url then click "Detect Hosting Provider" and we'll show you the associated host/ISP name and IP addresses.

HttpWatch is an HTTP viewer and debugger that integrates with IE and Firefox to provide seamless HTTP and HTTPS monitoring without leaving the browser window. It's available as a free edition and a PRO version that cost money and has additional features.

PlanSnapper.com is a web-based, purpose-built tool designed to measure and calculate ANSI-compliant Gross Living Area (GLA) from existing floor plans, blueprints, or sketches.

From websites to any of your design software in one click. Try fonts in your designs without buying them.

In the beginning was the need for a player. Adobe Flash Player Alternative! Google Cast feature for Android TV.

Convert Case is a free online text transformation tool designed to make changing the capitalization of your text quick and effortless. Whether you need to convert text to UPPERCASE, lowercase, Title Case, Sentence case, or other popular formats, simply paste your content and get...

Fully standalone tag cloud builder, realized as Firefox sidebar add-on, which also allows user to navigate and highlight each tag on your page. This add-on runs anywhere, where Firefox runs. Sometimes, especially on big peaces of web page text, it is very useful to analyze page...

B.S. Detector is a browser extension that warns users about unreliable news sources. It basically searches all links on a given webpage for references to unreliable sources, checking against a manually compiled list of domains.

Initab is a Chrome New Tab Extension for developers that offers a solution to continually having too many tabs open. It also offers several useful tools to make your job as a developer easier with a quick view of your GitHub or GitLab Issue activity, Stack Overflow activity, and...

This project aims at creating a universal dark theme for Firefox while adhering to the modern design principles set by Mozilla.

SpotiShush will instantly mute the browser tab once it detects an audio ad will play. After the ad finishes, SpotiShush will restore the tab's audio so you can enjoy your favorite songs again!

Send to My-phone (QR Code Generator) is a restartless Chrome/Firefox/Opera extension to generate QR code of any open website. It is the easiest way to send a web-page from your desktop to cellphone browser.

Easily convert web pages to a PDF using this web-based online tool. You can use it as an online-service or as a Firefox add-on. Unfortunately you can only store whole web pages as a PDF-file, not only selected parts of a web page.

A REST client for almost any web service (Firefox and Chrome extension).

The Query & Answer System for the Coder Community.

Eight Dollars can help you tell the difference between actual verified accounts and twitter blue users on the Twitter website.

Browser extension for Firefox that bypasses intermediary redirect pages, extracts final destination URLs, allows editing of skip lists, and saves time and enhances privacy.

3D printing doesn’t have to be a complicated, analog, SD card-filled experience; step into the future of modern 3D printing - using your phone, tablet or computer.

FREE browser extension. Blocks harmful sites, protects your privacy and finds deals while you shop.

Protect yourself and your organization from cybercrime by using Netcraft’s family of apps and extensions for your browser, phone, and email client.

Redirects all YouTube links to Invidious. Previously hooktube-redirect, but changed since Hooktube is no longer allowed to use the YouTube API, apparently.

Invidition is an extension allowing you to redirect YouTube and X requests to their counterparts, Invidious and .

As you browse the internet, sites you visit can attempt to take screenshots of your computer as a pixel-by-pixel unique digital "fingerprint" of you & and your devices. This is called canvas fingerprinting.