Firefox add-on with keyword - prevent

View results for prevent in Firefox Browser Add-ons
Keyword difficulty: 36

Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.

There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.

To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.

250 results. Page 1 of 10.
CanvasBlocker
#1, CanvasBlocker
CanvasBlocker
kkapsner
Alters some JS APIs to prevent fingerprinting.
4.61 (384)
25,880
Facebook Container
#2, Facebook Container
Facebook Container
Mozilla Firefox
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
4.46 (3,958)
995,348
Merlin
Smart Prevent Duplicate Tabs
#3, Smart Prevent Duplicate Tabs
Smart Prevent Duplicate Tabs
Guilherme Nascimento
Prevents AUTOMATIC creation of new tabs or repeating tabs when two or more tabs have the same addresses. The process of closing repeated tabs is automatic based on the settings that you can determine within the extension/add-on.
4.07 (15)
317
Belka WebRTC: Prevent IP leak
#4, Belka WebRTC: Prevent IP leak
Belka WebRTC: Prevent IP leak
Digi-App Ltd.
Disable WebRTC and prevent IP leak.
3.00 (4)
217
Decentraleyes
#5, Decentraleyes
Decentraleyes
Thomas Rientjes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
4.80 (1,424)
265,940
Endpoint Data Loss Prevention Plus
#6, Endpoint Data Loss Prevention Plus
Endpoint Data Loss Prevention Plus
ManageEngine
Prevent the loss of sensitive data using ManageEngine Endpoint DLP Plus
0.00 (0)
940
PopUpOFF
#7, PopUpOFF
PopUpOFF
RomanistHere
Removes and prevents popups, overlays and cookie notifications, other tools do not. Enjoy the original look of the internet.
4.47 (75)
25,383
Prevent Pwned Passwords
#8, Prevent Pwned Passwords
Prevent Pwned Passwords
Chris Wilson
Checks password hashes against Have I Been Pwned and displays a notification if the hash has been leaked in a breach.
3.00 (3)
75
Prevent Closing Window
#9, Prevent Closing Window
Prevent Closing Window
jscher2000
Displays the "Leave Page" prompt to avoid accidentally closing the current window. **BUG** To allow Firefox to shut down, click Stay on page and the Close This Tab button before you exit.
3.89 (9)
54
Tab Reloader (page auto refresh)
#10, Tab Reloader (page auto refresh)
Tab Reloader (page auto refresh)
James Fray
An easy-to-use tab reloader with custom reloading time settings for individual tabs
4.02 (388)
79,151
Merlin
Prevent Shortcut Takeover
#11, Prevent Shortcut Takeover
Prevent Shortcut Takeover
Eric
Stop sites from taking over your keyboard shortcuts
4.00 (4)
21
Prevent Custom Document Role
#12, Prevent Custom Document Role
Prevent Custom Document Role
Alex Vallat
Prevents web pages from declaring a custom ARIA accessibility role for the body. This enables WebAutoType and KeyLayoutAutoSwitch to access the URL.
0.00 (0)
19
GitHub: Prevent search hijacking
#13, GitHub: Prevent search hijacking
GitHub: Prevent search hijacking
Yuri Khan
GitHub overrides the slash key to focus its search box. This extension restores the default Firefox behavior to pop up the Find bar.
5.00 (1)
24
Prevent BBC redirect
#14, Prevent BBC redirect
Prevent BBC redirect
joshua-scott
Prevent bbc.co.uk redirecting to bbc.com
0.00 (0)
10
Prevent autoplay on Youtube
#15, Prevent autoplay on Youtube
Prevent autoplay on Youtube
PinkPandaKatie
Prevents Youtube videos from automatically playing. You must either click the play button or press space to start the video.
3.75 (4)
9
Prevent PDF Viewer on Download
#16, Prevent PDF Viewer on Download
Prevent PDF Viewer on Download
Morpheus0x
Prevents a new tab from opening after downloading a PDF and optionally shows a `Save As...` window to choose where to save the PDF.
0.00 (0)
8
Block Site
#17, Block Site
Block Site
Ray
A customizable, password-protected website blocker and redirector.
4.04 (405)
72,127
Digital Eye Strain Prevention Tool
#18, Digital Eye Strain Prevention Tool
Digital Eye Strain Prevention Tool
Wesley Branton
Prevent permanent damage to your eyes while browsing the web with this tool.
3.60 (10)
20
Mouse Gesture Events
#19, Mouse Gesture Events
Mouse Gesture Events
Simpler
Control your browser faster and easier with gestures using mouse movement.
3.96 (187)
6,122
WebRTC Leak Shield
#20, WebRTC Leak Shield
WebRTC Leak Shield
Hoxx Vpn
Disable WebRTC and prevent IP leak.
4.44 (312)
20,554
New Tab Override
#21, New Tab Override
New Tab Override
Sören Hentzschel
New Tab Override allows you to set the page that shows whenever you open a new tab.
4.35 (961)
66,250
ClearURLs
#22, ClearURLs
ClearURLs
Kevin R.
Removes tracking elements from URLs
4.44 (780)
213,388
NoScript Security Suite
#23, NoScript Security Suite
NoScript Security Suite
Giorgio Maone
The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
4.40 (2,205)
305,969
Google Cal Event Merge
#24, Google Cal Event Merge
Google Cal Event Merge
Amy Ciavolino
Chrome extension that visually merges the same event on multiple Google Calendars into one event. Source: https://github.com/imightbeamy/gcal-multical-event-merge
4.21 (19)
731
Popup Blocker (strict)
#25, Popup Blocker (strict)
Popup Blocker (strict)
Jeremy Schomery
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address
4.22 (454)
61,641
250 results. Page 1 of 10.