Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Copy Plain Text without any formatting

Mouse gestures for Firefox. A web extension alternative to FireGestures created by a long time FireGestures user.

Dark theme and night shift mode for every website. Care your eyes, use Dark Mode for night and daily web browsing.

Save a complete web page (as currently displayed) as a single HTML file that can be opened in any browser. Save a single page, multiple selected pages or a list of page URLs. Automate saving from command line.

Collection of Tab Related Actions e.g. Duplicate, Close Duplicates, Close to the Left, Copy Title, Merge Windows, Save as PDF, Copy Urls Tab/All/Left/Right, Host keep/close/close other, Sort by URL/Title, Asce/Desc, Move, Reload, Reload Timer

Zoom web pages (either per-site or per-tab) using full-page zoom, text-only zoom and minimum font size. Fit-to-width zooming can be applied to pages automatically. Fit-to-window scaling can be applied to small images.

An easy-to-use font inspector to get CSS styles of the selected element

Select a number of links with a rectangle and open them in new tabs. You can also lasso checkboxes to quickly check or uncheck them. Works with radio buttons as well.

Easily print any page to PDF with just one click!

A highly customizable dark theme for Google products (search, images, translate, and contacts)

Open current page or link in Microsoft Internet Explorer browser

This add-on allows you to quickly generate a QR code offline with the URL of the open tab or any (selected) other text! 👍

It works completely offline protecting your privacy and has a big range of features like colored QR codes!

Add download link to all SoundClould tracks

With the Bookmarks Organizer it's easy to put order in your bookmarks. The Bookmarks Organizer finds no longer working bookmarks, redirects, duplicates and more!

Download youtube videos as mp3/mp4/ogg/webm fast and easy! Adding mirrors everyday to decrease any downtime! We monitor comments and work to fix any problems as soon as possible!

Switch to mobile view with one click via toolbar button.

Yomichan turns your browser into a tool for building Japanese language literacy by helping you to decipher texts which would be otherwise too difficult tackle. It features a robust dictionary with EPWING and flashcard creation support.

Easy to use and powerful image downloader for your browser

Record your computer's screen with just one click!

Speed Dial allows you to add and manage bookmarks in the New Tab page and gives you an optional search experience.

Take tabs from parent windows and arrange them in layouts of tiled sub-windows, using the toolbar button, context menu or keyboard shortcuts. Makes it easy to browse, compare or monitor multiple pages. Synchronize scroll. Save and re-open layouts.

Custom color schemes for all websites: night mode, dark themes, blue light filter, screen shader, high contrast, grayscale, etc.

Traditional and Simplified Chinese Converter

Right click on an image to search Google for related images or versions in different sizes.

a handy multi-language translator built on top of Google translate.

Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.

Add, modify or remove a header for any request on desired domains.

Auto Fullscreen for Firefox Quantum

Open the link in a new tab depending on the setting.