Bypassing Security Restrictions and Signing Code

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Early versions of Firefox allowed web sites to segregate principals using signed scripts, and request extra permissions for scopes within signed scripts using a function called enablePrivelege. These Privilege Manager feature was not used much (aside from abuse), and its complexity made performance improvements difficult. Signed script segregation was removed in bug 726125, the enablePrivilege prompt was removed in bug 750859, and enablePrivilege itself was nerfed in bug 757046.

The Privilege Manager has been deprecated in Firefox 12 and disabled in Firefox 17.

Sites that require additional permissions should now ask Firefox users to install an extension, which can interact with non-privileged pages if needed.

See also