Firefox Relay
Firefox Relay lets you generate email aliases that forward to your real inbox. Use it to hide your real email address and protect yourself from hackers and unwanted mail.
250,550 users
Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
66,346 users
Firefox Multi-Account Containers
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs. Cookies are separated by container, allowing you to use the web with multiple accounts and integrate Mozilla VPN for an extra layer of privacy.
410,103 users
GIPHY for Firefox
Bring the power of a GIF search engine anywhere on the web. Respond to emails, tweets and more with GIFs quickly and easily. Add GIPHY GIFs to your Gmail, Facebook, Twitter and more. Just search, drag and drop or right click!
7,355 users
Turn Off the Lights for Firefox
The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube and Beyond. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.
47,529 users
Show Video Controls for Firefox
Automatically enables video controls when playing html webm videos.
3,512 users
Fire Resizer
Display and set your browser width. Excellent for responsive web design and testing media queries. Includes keyboard shortcuts!
67 users
Window Resizer
Window resizer is a utility extension that allows you to resize any browsing window to a list of options or customize the size per your needs.
365 users
Resize Window & Viewport
Resize browser window or viewport to desired screen widths. Firefox's Responsive Design Mode (Ctrl + Shift + M) is great for mobile devices emulation.
940 users
Youtube resizer by iAlen
Youtube thumbnail resizer brings back 6 thumbnails in row instead of 4
536 users
Window Layout Resizer
Resize the current window into different customizable layouts (Multiple monitors are supported).
434 users
Window Resizer
Resize and align the CURRENT layout to the predefined position with multi monitor support
114 users
Video Aspect Ratio Resizer 🎥
Advanced video control with zoom and screen fitting that resizes the Aspect Ratio of the video to fit the screen or to your desired zoom %, so that you don't have the black bars on the side of the video and can get a cinematic experience.
197 users
Bulk Resize Photos
Bulk Resize Photos offers free, super-fast image resizing in your web browser. This Bulk Resize Photos extension adds a "Resize Image" option in the context menu that appears when you right-click on images in webpages.
67 users
Simple Window Resizer
Quickly moves your Firefox window to a pre-defined position on your screen.
108 users
PDF Tools - Convert, Resize & Merge
Manipulate PDF documents via Ghostscript interpreter right in your browser.
150 users
