Site Rule

The Site Rule allows you to define for which websites a profile or a profile rule is used.

Site Rules are written as Regular Expressions and matched against the URI of the website containing the form to be filled out.

e.g. the following Site Rule enables the profile or profile rule for all forms on the Autofill Forms project page:
(?:^http:\/\/autofillforms\.mozdev\.org)

The standard Site Rule matches all websites:
(?:)

The Rule Editor which can be accessed with the button behind each Site Rule field allows you to define your own Site Rules without the need to understand Regular Expressions.