Displays the number of open tabs.

Search for or filter the Tabs in TST's sidebar, and quickly find and activate them.

Keep manual or automatic backups of all tabs*, and restore on demand. Can also export backup file to disk to restore later, or to another profile, even on another computer or OS, as long as it has Tabs Backup & Restore installed. *(See description)

Allows to restart the browser with a button.

Tabs open in the same container as the first tab in the window.

Close all the the currently open tabs.

Easily get words out of an image with OCR engine!

Sleep Mode will temporarily put all tabs to sleep mode for saving RAM memory, saving battery and make your computer/laptop faster.

TabGroups married with Tab Containers and bookmark & history search

Close all open tabs. Optionally close pinned tabs and incognito mode tabs. Keyboard Shortcut: Alt + W.

Disable YouTube HTML5 player from auto-playing.

Compose an email from your tabs

Provides tab groups / panorama functionality using the tab hide api.
Manage tab groups in a compact, tiled groups view.

Easily view PDF and MS Office documents in your browser.

Provides ability to save selected tabs to local files.

Automatically close all blacklisted webpages specified by the user.

Find tabs in Mozilla-based browsers easily

Drag links to open them

For my autistic son. Limits tabs to maintain system responsiveness.

Select and search in Wikipedia with mouse right-click.

Open all magnet links in all tabs with a single click!

Create a popup of pages with minimal browser UI; No bookmarks or navigation bar.

A dynamic theme that allows colouring Firefox in a Vivaldi style fashion.

The green alien needs your help to jump higher! The famous Doodle Jump game is available in your browser.

Add anotations in a webpage, that will be available in your next visit. There are different kind of anotations, as sticky notes, multimedia recordings (audio/video) or text highlighting. Export and share your anotations.

Manually discard all open tabs except the current one. Speed up your browser.

Yandex Music Controls plugin lets you quickly see what’s currently playing, change a song, and play or pause music from any tab by simply clicking an extension icon. Hotkeys are available!

Adds close right tabs button.

Open the active tab in a private window via toolbar button or context-menu.

Easy Session Manager allows you to manage your Firefox session (tabs) by backing up or loading them in your current profile.