How conditions combine

Conditions describe one request from several perspectives: its URL and destination, the origin that initiated it, the top-level page around it, its method and resource type, and the tab where it occurs.

Different condition types narrow one another. For example, a profile can require a destination domain, a GET method, and an xmlhttprequest resource type. Exclusions remove matches from their corresponding include set.

Included and excluded values

Included values narrow the requests that can match. Excluded values remove requests from that result. When a profile has several condition types, a request must satisfy all of them.

Tabs and tab groups

Tab and Tab Group conditions apply the same profile to selected tabs or exclude those tabs from otherwise matching requests.

Selections saved under Tab IDs and Tab groups are cleared when the browser restarts. Chrome only guarantees these IDs within the current browser session, so this is a browser limitation, not a Headerly limitation.

Headerly automatically pauses any profile that had an active tab or tab-group condition before the restart. This prevents the profile from unexpectedly applying to more tabs after its saved selection is cleared.