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StartXXL extended Search and New Tab. Create your custom hompage and new tab startpage.

Prevents accidental closing of tabs.

Copy browser tabs to (or create them from) your clipboard.

Learning Chinese or Japanese? Replace your new tab page with a personal learning page featuring one new character everyday.

Right click on an image to reverse image search it with Google, Bing, and Yandex.

Makes forms open in new tabs if you're holding down a meta key while you click.

A port of Tab Toggle by firesofmay legacy addon to Firefox Quantum and higher versions Pressing ALT-Q will switch to previous tab. Repeating this will toggle between two tabs.

Imagine that you are square and jump over obstacles.

Go back to the very first page that was opened in the current tab.

A minimalistic, Google like alternative to YouTube's homepage

Limit the number of tabs a given window can have (i.e. set a maximum number of tabs on a per-window basis) and automatically open additional tabs in a different window.

Unload Tab from context menu to free up system resources. Really it is just to satisfy all of you with OCD. ;D

Access to Telegram's web application in a separate window or tab and get notified when new messages received

Replace the new tab with a blank page matching Firefox's built-in dark mode

Set open tabs aside in a collection and restore them later.

Makes the Browser Open without Browser UI (address bar, toolbar, etc.).

Allows you to share already signed into website sessions with your friends or your other devices via email, chat, or Firefox's Synced Tabs functionality.

Easily download torrents via transmission client from your browser