The first thing to point out about portability is that not all browsers run on all operating systems. While Firefox, Chrome and Opera work on all major systems and are easy to install, Internet Explorer, Edge and Safari only work on Microsoft and Apple’s own systems. The mobile version of Safari is pre-installed on Apple’s mobile devices, and most Android devices come with a pre-installed browser modified by the manufacturer for the device. Firefox, Chrome, Edge and Opera can easily be installed and even used side by side.
首先要指出的是，并非所有浏览器都能在所有操作系统运行。尽管 Firefox、Chrome 及 Opera 能在各主要操作系统运行，且很容易安装，但 Internet Explorer、Edge 及 Safari 仅能运行于 Microsoft 或 Apple 各自系统中。Apple 移动设备预装移动版 Safari，而大多数 Android 设备都预装其制造商的定制版浏览器。Firefox、Chrome、Edge 和 Opera 均可以轻松安装，甚至可以同时使用。