Securing your site

There are a number of things you can do to help secure your site. This article offers an assortment of suggestions, as well as links to other articles providing more useful information.

User information security

How to turn off form autocompletion

Form fields support autocompletion in Gecko; that is, their values can be remembered and automatically brought back the next time the user visits your site. For certain types of data, you may wish to disable this feature.

Privacy and the :visited selector

This article discusses changes made to the getComputedStyle() method that eliminate the ability for malicious sites to figure out the user's browsing history.

Content security

Properly configuring server MIME types

There are several ways incorrect MIME types can cause potential security problems with your site. This article explains some of those, and shows how to configure your server to serve files with the correct MIME types.

HTTP Strict Transport Security

The Strict-Transport-Security: HTTP header lets a web site specify that it may only be accessed using HTTPS.

HTTP access control

The Cross-Origin Resource Sharing standard provides a way to specify what content may be loaded from other domains. You can use this to prevent your site from being used improperly; in addition, you can use it to establish resources that other sites are expressly permitted to use.

Content Security Policy

An added layer of security that helps to detect and mitigate certain types of attacks, including Cross Site Scripting (XSS) and data injection attacks. These attacks are used for everything from data theft to site defacement or distribution of malware.

The X-Frame-Options response header

The X-Frame-Options: HTTP response header can be used to indicate whether or not a browser should be allowed to render a page in a <frame>. Sites can use this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites.

See also

• Open Web Application Security Project (OWASP)