The first thing to point out about portability is that not all browsers run on all operating systems. While { -brand-name-firefox }, { -brand-name-chrome }, { -brand-name-edge }, { -brand-name-brave } and { -brand-name-opera } work on all major systems and are easy to install, { -brand-name-ie } and { -brand-name-safari } only work on { -brand-name-microsoft } and Apple’s own systems. The mobile version of { -brand-name-safari } is pre-installed on Apple’s mobile devices, and most { -brand-name-android } devices come with a pre-installed browser modified by the manufacturer for the device. { -brand-name-firefox }, { -brand-name-chrome }, { -brand-name-brave }, { -brand-name-edge } and { -brand-name-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 { -brand-name-firefox }、{ -brand-name-chrome }、{ -brand-name-edge }、{ -brand-name-brave } 及 { -brand-name-opera } 能在各主要操作系统运行，且很容易安装，但 { -brand-name-ie } 和 { -brand-name-safari } 仅能运行于 { -brand-name-microsoft } 或 Apple 各自的系统中。Apple 移动设备预装移动版 { -brand-name-safari }，而大多数 { -brand-name-android } 设备都预装其制造商的定制版浏览器。{ -brand-name-firefox }、{ -brand-name-chrome }、{ -brand-name-brave }、{ -brand-name-edge } 和 { -brand-name-opera } 均可以轻松安装，甚至可以同时使用。