Method waitForStartup

tests/browser/environment.js:57–61

* @returns {Promise }

()

     * @returns {Promise<void>}
     */
    async waitForStartup() {
        if (!this.extensionOrigin) {
            return new Promise((ready) => this.extensionStartListeners.push(ready));
        }
    }

    /**
     * @returns {Promise<Browser>}