Returns the active panel configuration.
|options|: Specifies the context to return the configuration for.
|callback|: Called with the active panel configuration.
Opens the side panel for the extension.
This may only be called in response to a user action.
|options|: Specifies the context in which to open the side panel.
|callback|: Called when the side panel has been opened.
Configures the extension's side panel behavior. This is an upsert
operation.
|behavior|: The new behavior to be set.
|callback|: Called when the new behavior has been set.