Firefox developer tools

This is a list of WebExtensions^[a] that are recommended by Mozilla.^[2]

Mozilla software

Browser extension	Free license	Dependencies		WebExt	Rec.^[2]	Category	Description
Browser extension	Free license	Nonfree JS site	Nonfree server	WebExt	Rec.^[2]	Category	Description
Cookie AutoDelete	MIT	No	No	Yes	Yes	Privacy and security
Decentraleyes	MPL-2.0	No	No	Yes	Yes	Content delivery network (CDN) emulation
DownThemAll!	GPL-2.0	No	No	Yes	Yes	Download manager	A download manager and accelerator.
FoxyProxy Standard	GPL-2.0	No	No	Yes	Yes	Privacy and security	Proxy management tool
HTTPS Everywhere	GPL-2.0-or-later	No	No	Yes	Yes	Transport Layer Security (TLS)	HTTP Secure whenever possible.
NoScript	GPL-2.0	No	No	Yes	Yes	Privacy and security	JavaScript and other potentially executable content.
Privacy Badger	GPL-3.0	No	No	Yes	Yes	Adblocker	Do Not Track setting in a user's web browser.
Read Aloud	GPL-3.0	No	No	Yes	Yes	Accessibility	A Text to Speech Voice Reader
Stylus	GPL-3.0	No	No	Yes	Yes	CSS	Customization
Turn Off the Lights	GPL-2.0	No	No	Yes	Yes	Customization	Obscure or mask content other than a running video.
uBlock Origin	GPL-3.0	No	No	Yes	Yes	Wide-spectrum content blocker	Blocking ads and filtering content via a paired blacklist and whitelist.
Zoom Page WE	GPL-2.0	No	No	Yes	Yes	Accessibility	computer vision syndrome (CVS)

Browser extension	Free license	Dependencies		WebExt	Rec.^[2]	Category	Description
Browser extension	Free license	Nonfree JS site	Nonfree server	WebExt	Rec.^[2]	Category	Description
Enigmail	MPL-2.0	No	No	Yes	Yes

^ WebExtensions are designed for web browsers based on Mozilla Firefox 57 or later. Legacy add-ons are not listed on addon.mozilla.org.^[1] Many Firefox extensions work in the SeaMonkey web browser as well as the Pale Moon web browser and the Thunderbird e-mail client.