interface _OnBeforeNavigateDetails {
    frameId: number;
    parentFrameId: number;
    processId?: number;
    tabId: number;
    timeStamp: number;
    url: string;
}
Index
frameId parentFrameId processId? tabId timeStamp url
frameId: number

0 indicates the navigation happens in the tab content window; a positive value indicates navigation in a subframe. Frame IDs are unique for a given tab and process.

parentFrameId: number

ID of frame that wraps the frame. Set to -1 of no parent frame exists.

processId?: number

The ID of the process runs the renderer for this tab.

Unsupported on Firefox at this time.

tabId: number

The ID of the tab in which the navigation is about to occur.

timeStamp: number

The time when the browser was about to start the navigation, in milliseconds since the epoch.

url: string