Basic JSON Formatter
Adds a page action to pretty-print JSON. Unlike similar extensions, this simply pretty-prints it. It doesn't add any kind of viewer, colors, or collapsing. If you want this to work as expected, disable devtools.jsonview.enabled in about:config.
2,050 users
FontARA Font Changer ( for all sites )
✨ FontARA - The ultimate font changer for Persian, Arabic, Kurdish & Dari websites with more languages coming soon! 🚀 ----- ✨ فونتآرا - تغییردهنده حرفهای فونت برای متون فارسی، عربی، کردی و دری - به زودی برای همه زبانها! 🚀
2,020 users
Print/Print Preview Context
Adds Print, Print Preview and Save as PDF commands to the context menu.
1,972 users
Perapera Chinese Popup Dictionary
Put your mouse over any Chinese words on a webpage and it gives you the pronunciation and definition. Simple as that! As of version 2.1 PeraPera Chinese now supports Cantonese!
1,967 users
Play YouTube Video In Background
Prevents YouTube and Vimeo from stopping Firefox from playing videos in the background. It is mainly useful for Android devices.
1,957 users
vToad New Tab Page - Custom Live Wallpapers
Upload and set your own videos as your new tab live wallpaper, create shortcuts, set theme colors and more!
1,957 users
HMO - Hide "Members-Only" YouTube videos
Lightweight HMO addon for Firefox! Less than half the size of the Chromium addon! Hides "members-only"-tagged videos on YouTube if they are on a ".../videos" URL page. Ability to switch between remove entirely or only "hide" (black voids)!
1,947 users
View Page Source (Mobile)
Adds the ability to open the page source in a new tab via button (Desktop) or menu (Firefox for Android).
1,938 users
Backspace Enabler
Re-enable disabled by default ability to hit the Backspace key to go back to the previous page. Backspace Enabler gets this functionality, while keeping ability to delete text while in text box. PLEASE POST FEEDBACK / REVIEW
1,903 users
Vertical Tabs Reloaded
This Firefox add-on arranges tabs in a vertical rather than horizontal fashion. Hide and display manually the tab sidebar with a hotkey (Ctrl+Shift+V) or by clicking on the VTR icon.
1,898 users
Youtube Shorts Block
An Open Source extension that Blocks YouTube Shorts. If you like it, feel free to check it out on github.
1,890 users
AutoCopy
Copy the selected text only, when the mouse button is pressed for a specified time.
1,866 users
Auto Highlight
🟨 Auto Highlight will help you see what's important on the web! ✅ ⚡ Supports RegExp search and many style and highlight options ⭕ 🥷 Hide text by setting font size to zero! 🔄️ Synchronize highlighter rules across devices.
1,854 users
Pesticide
This extension inserts the Pesticide CSS into the current page, outlining each element to better see placement on the page.
1,854 users
