Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Country Flags & IP Whois
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
23 900 users
Auto Tab Discard
Use native tab discard method to automatically reduce memory usage of inactive tabs
18 000 users
Easy Youtube Video Downloader Express
WORKS WITH NEW YOUTUBE LAYOUT, "Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.
400 456 users
TinEye Reverse Image Search
TinEye is a reverse image search engine. The extension adds a context menu item so you can search for an image to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.
64 142 users
Lazada Price Tracker
Lazada Price Tracking 1. Track historical price of any Lazada products. 2. Shortcuts visit Lazada.
84 users
京价保 - 京东价保助手
京价保（京价宝）是自动为你申请京东价格保护，自动签到领京豆，自动领券的多功能京东助手
1 409 users
沙拉查词-网页划词翻译
Chrome 上超好用的划词翻译扩展现已登录 Firefox！全新工匠打磨，极致交互体验，新增更多词典，支持 PDF，兼容 Vimium 全键盘操作。
3 050 users
Scholarscope
自动加载PubMed搜索结果中期刊的信息，显示它们的影响因子以及该领域的排名。 Pubmed是美国国立卫生研究所管理的、向全球开放的数据库。用户可以在网站上检索已经或是即将发表的文献，并查看这些文献的相关信息，包括作者、期刊、发表日期、摘要和下载信息。网站链接为 https://www.ncbi.nlm.nih.gov/pubmed/
3 531 users
Avira Browser Safety
Avira Browser Safety protects you from malicious websites & invisible trackers
67 769 users
Clever
A companion for students and teachers that extends the Clever Portal to enable Saved Password applications.
2 144 users
Emsisoft Browser Security
Blocks bad websites and prevents phishing without tracking your browsing activity.
7 570 users
YouTube Download Helper
2018 updated downlaod helper for YouTube. Download any video from YouTube to MP3, MP4, WEBM, M4A or 3GP. Subtitles and thumbnails also available for download with a single mouse click!
6 389 users