Guard against CSS data exfiltration attacks.

Latest Version

Version
1.1.0
Update
August 25, 2020
Size
40.85KiB
Developer
mike-gualtieri.com
Category
Users
3,000+
Rating
4 ★
Manifest Version
2
Web Store Status
Languages Support
English
See more
Permissions
Http://*/
Https://*/
Storage
Tabs
See more

CSS Exfil Protection Extension

Guard your browser against CSS Exfil attacks!

CSS Exfil is a method attackers can use to steal data from web pages using Cascading Style Sheets (CSS). This plugin sanitizes and blocks any CSS rules which may be designed to steal data.
Read more

Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 2, "name": "CSS Exfil Protection", "version": "1.1.0", "description": "Guard against CSS data exfiltration attacks.", "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self'", "permissions": [ "http://*/", "https://*/", "storage", "tabs" ], "homepage_url": "https://www.mike-gualtieri.com/css-exfil-vulnerability-tester", "icons": { "16": "icons/icon-16.png", "32": "icons/icon-32.png", "48": "icons/icon-48.png", "64": "icons/icon-64.png", "128": "icons/icon-128.png" }, "browser_action": { "default_icon": { "48": "icons/icon-48.png" }, "default_popup": "popup.html" }, "options_ui": { "page": "popup.html", "chrome_style": true }, "content_scripts": [{ "js": ["content.js"], "matches": [""], "all_frames": true, "run_at": "document_start" }], "background": { "scripts": ["background.js"] }}
Read more

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User reviews

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Harald Haugli (ID: 00000076d6668e2b) Voted 2 ★ - Updated 06/26/2018 Not very usable when it prevents style sheets from actually working properly.