export declare class WebExtension {
    _id: string;
    _referenceId: string;
    _version: string;
    _store: string;
    _storeType: string;
    properties: {
        [k: string]: string;
    };
    constructor(id: string, referenceId: string, version: string, store: string, storeType: string);
    property(k: string, v: string): this;
}