prevent
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5 250 results. Page 1 of 10.
Alters some JS APIs to prevent fingerprinting.
37,999
4.58 
(485)
(485)
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.
764,758
4.45 (4,113)
(4,113)
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.
360
4.00 (19)
(19)
Prevent the loss of sensitive data using ManageEngine Endpoint DLP Plus
3,258
0.00 (0)
(0)
Removes and prevents popups, overlays and cookie notifications, other tools do not. Enjoy the original look of the internet.
47,225
4.31 (157)
(157)
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.
55
3.70 (10)
(10)
Check instantly whether the paper you're viewing is already saved in Zotero. A simple tool to prevent duplicate saves.
111
0.00 (0)
(0)
Checks password hashes against Have I Been Pwned and displays a notification if the hash has been leaked in a breach.
50
3.00 (3)
(3)
Disable WebRTC and prevent IP leak.
45
3.00 (4)
(4)
Prevents YouTube videos from auto-pausing within the first 10 seconds.
94
1.00 (1)
(1)
An easy-to-use tab reloader with custom reloading time settings for individual tabs
79,616
4.07 (463)
(463)
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.
246,429
4.79 (1,573)
(1,573)
Prevents unwanted autoplay on Twitch
35
4.50 (2)
(2) Stop sites from taking over your keyboard shortcuts
23
4.33 (6)
(6)
Prevents Youtube videos from automatically playing. You must either click the play button or press space to start the video.
11
3.75 (4)
(4) Prevents web pages from declaring a custom ARIA accessibility role for the body. This enables WebAutoType and KeyLayoutAutoSwitch to access the URL.
13
0.00 (0)
(0) Prevents a new tab from opening after downloading a PDF and optionally shows a `Save As...` window to choose where to save the PDF.
10
0.00 (0)
(0)
A customizable, password-protected website blocker and redirector.
72,176
3.90 (525)
(525) GitHub overrides the slash key to focus its search box. This extension restores the default Firefox behavior to pop up the Find bar.
13
5.00 (1)
(1)
Control your browser faster and easier with gestures using mouse movement.
4,849
3.98 (194)
(194)
Removes tracking elements from URLs
515,641
4.26 (1,097)
(1,097)
Prevent permanent damage to your eyes while browsing the web with this tool.
17
3.83 (12)
(12)
Disable WebRTC and prevent IP leak.
15,065
4.40 (332)
(332)
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.
245,595
4.40 (2,468)
(2,468)
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
83,691
4.16 (542)
(542)250 results. Page 1 of 10.