Ecosia is a search engine that uses 80% of its profits from ad revenue to plant trees. By searching with Ecosia you can help the environment for free. This extension adds Ecosia.org as the default search engine to your Firefox browser. Give it a try!
An easy-to-use font inspector to get CSS styles of the selected element
Select text and search from the context menu or a tiled popup using any of your installed search engines. Add new search engines with a right-click, edit favicons and query strings. POST compatible, simple UI, highly configurable. For FF 57+
a powerful tool to translate words or sentences
It may be the most user-friendly new tab on Firefox browser
MAL-Sync enables automatic episode tracking between MyAnimeList/Anilist/Kitsu and multiple anime streaming websites. Anime: crunchyroll netflix kissanime 9anime gogoanime twist.moe -And more- Manga: kissmanga mangadex mangarock
Blocks all types of ads (Banner, Widget Style, Text, etc.) while using Gmail, Yahoo Mail, Hotmail and Outlook Mail.
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。
Set your browser's default search to use Presearch.org
See books, music and more at your local library as you browse the internet
Securely search, shop & download online by easily identifying harmful websites. Also, get easy access to custom web search.
Search music straight from your address bar! Just type in M, than press TAB and type in artist or song. Looking for a favorite Song use search4musix.