获取B站(bilibili)视频封面图
为哔哩哔哩网站（俗称B站：https://www.bilibili.com）增加右键菜单，用于获取视频封面图片，用法如下： 1、鼠标移动到对应的视频上，点击右键，即可呼出下载封面图快捷菜单。 2、点击“获取B站视频封面图”，成功获取会在新标签页打开获取到的封面。 注意：新标签打开图片时，可能提示需要弹出窗口权限。
578 users
IMDb Search (Internet Movie Database)
Select some text, right-click and choose "Search in IMDb" in the menu, a new tab will open with the searched text in IMDb (all topics).
576 users
NAV filter
This addon makes the "Incoming messages" list of ugyfelkapu.magyarorszag.hu more readable by providing background coloring.
575 users
Very Simple Notepad
This is a Very Simple Notepad. Good for everything. Just jot down your Ideas or notes so you don't forget them. Very helpful. Saves when you close it. Saves and works on all tabs. If you can support, please do so at PAYPAL.ME/USEFULPROGRAMMER
574 users
Old Twitter Layout (2026)
Browser extension to return old Twitter layout from 2015 (and option to use 2018 design). This extension doesn't add any CSS on top of original Twitter. It's fully original client that replaces Twitter, making it much faster than alternatives.
574 users
CanvasPlus
CanvasPlus: Power up your learning with color themes, navigation shortcuts, and improved performance.
572 users
Make Medium Readable Again
Improves the Medium reading experience, ruined by user engagement tactics.
571 users
Muzli - Design inspiration hub
Your daily dose of design with industry news, tools, and inspiration - all in one place.
569 users
Save Tab URLs
Show, save and restore the page URLs along with page Titles of all opened tabs of current browser window. Show as copyable plaintext. Save and restore from text file.
568 users
Selection Translate - For AltKey
Selecting text and holding alt key, translated results will show up on current web pages. No need to leave current web pages.
567 users
Telegram
Telegram Web tab will be pinned to Firefox. If Telegram tab is not present, a new one will be created.
566 users
DarkCloud
SoundCloud Dark Theme With this extension, you'll get a darker themed SoundCloud for those who prefer it, either because it looks cooler or it goes easier on your eyes!
566 users
Claude Meter - Claude Usage Tracker
Track your Claude AI usage in real time. See session limits and reset timers at a glance.
566 users
Blur. The Image and Video blur extension
A chrome extension that blur all images on a page, for when you want to be discreet or don't want to look at certain images.
561 users
Ecosia Dark Mode
A dark theme experience for the Ecosia search engine and associated services.
561 users
Play to Kodi
Play, queue and remote control your favourite online media on Kodi / XBMC. This is a port of an add-on developed originally for Google Chrome.
560 users
Automatic Reader View
Automatically load webpages in Firefox's Reader View – as the default for the websites you specify.
558 users
![[TST] Colorize Tabs](https://addons.mozilla.org/user-media/addon_icons/2745/2745117-64.png?modified=03000b9f)
[TST] Colorize Tabs
This extension allows to set individual color for each tab in order to highlight it
556 users
YouTube Dark Mode Pro
Bring the dark theme to YouTube. This mode will reduce eyestrain and protect your eyes.
555 users
YouTube Enhanced Media Controls (for Mobile)
Adds an enhanced player wrapper to the YouTube mobile site (m.youtube.com), adding greater accessibility and providing fixes.
554 users
