另存为电子书 将网页/所选内容另存为电子书(.epub格式)-Chrome / Firefox / Opera Web扩展 如何安装 从 或手动(在v。52.0.2743.116上测试) 1. Navigate to chrome://extensions/ 2. Load unpacked extension ... 3. Select the extension's directory 从 或手动(在50.0a2版上测试) 1. Navigate to about:debugging 2. Load temporary add-on ... 3. Select the extension's directory Opera(经过39.0.2256.48版测试) 1. Navigate to opera:extensions 2. Load unpacked extension .