CSS Exfil Protection

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.

CSS Exfil Protection is available to install from Firefox Browser Add-ons and for download from this page. It has 1,430 active users The latest version is 1.1.0, and it was published 4 years ago.

Install from Firefox Browser Add-ons
View source code
Total download count: 0 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of CSS Exfil Protection here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions
Version Download Size Download count Timestamp
1.1.0 XPI · ZIP · Source code 46.83K 0 2020-08-24

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.

  1. Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  2. In Firefox browser, go to about:addons to open Add-ons Manager
  3. Click on , then select Install Add-on From File
  4. Select the CSS Exfil Protection ZIP file from step 1. CSS Exfil Protection is now installed on your browser.