Skip the envelope animation when receiving a gift card from MyGiftCardsPlus.

Blocks the opening of external tabs

Simple and powerful Cookie Editor that allow you to quickly create, edit and delete cookies with intuitive interface.

saves the open tabs.

This add-on works with showTabs extension.

Reload all tabs without their query params.

A simple yet effective extension to remind you task in the set time.
Very handy for anyone to set remainders for some tasks aside while working on current task.
Be productive by keeping tasks to be reminded later when needed.

Moves the reload bar to the address bar (thinner)

Quick Peek at links without leaving your current tab.

save links to pouch with one click.

WebExtension to popout the currently active tab as a popup window (without toolbar et cetera).

Open Tab Reloader (OTR) is an open-source add-on project designed for running on the Firefox web browser, allowing users to reload tabs with specific time-intervals automatically.

GitHub URL:
https://github.com/kokhong1995/open-tab-reloader

Open a tab, page, link or bookmark in a new empty temporary container that removes itself, when the last tab it contains get removed

"Draws attention" to windows which display a notification.

Changes new tab to a very simple text editor with multiple notes option

Make new-tab auto pinned

Custom Start page with your favorite websites.

Features:
Multiple Lists.
Create, Edit and Save Favorite Websites for easy navigation.
Ability to save background Images.
Easily add new Favorite from History.
Support for font awesome icons.

Open a new tab after closing all non-pinned tabs instead of switching to the last pinned tab.
Correctly handles hidden tabs.

This extension automatically sets MyBrowsersPage.com as your homepage and new tab page.

Mute / Unmute tabs by default + whitelisted and blacklisted domains.

Now you can open multiple links in new tabs!

Auto-Login for Magister 6 webapp.

Shows the iobroker vis page in an popup window

Switch current page to https://

The add-on to navigate by history from context menu

Toggle display property for WP admin bar.

Learn GRE top words every time a New Tab is opened.

Simple add-on that allows you to go to the link text instead of the actual link. Useful to easily avoid being scammed with suspicious emails or non trusted sites.

Open Great Internet Mersenne Prime Search (GIMPS) 2ᴾ-1 exponent numbers.

Get full-screen goodness on your agile boards.

New Tab page to display information about a random FRC team.