User-Agent Switcher and Manager for Firefox

User-Agent Switcher and Manager is a quite handy application when you want to use the Firefox browser with a different user-agent string, That means that the extension mimics other browsers, making specific sites and apps possible to visit and, respectively, run.

In other words, this small extension changes your browser's user-agent string to one that simulates another browser. For instance, you can set User-Agent Switcher and Manager to replicate Chrome so that you'll be able to access the full features of G Suite, which would otherwise only be available via the Chrome browser. The functionality of this extension goes beyond that. You can set it to simulate Safari on macOS and run Apple sites and web-based apps like you would be using a Mac computer. The app supports a multitude of browsers and operating systems.

User-Agent Switcher and Manager for Firefox uses two techniques to function. At first, it rewrites the "navigator.UserAgent" string to simulate another user-agent when users browse the Internet. Secondly, it modifies the "User-Agent" header, so the web servers would read only the simulated user-agent, and not the actual one of the Firefox browser. It comes with three operation modes, namely, Black-list, White-list, and Custom. In the Black-list one, the custom user-agent would be set for all open tabs, except for the blacklisted ones. In White-list, the user-agent string would be available only for those tabs with names that match the ones in the mode's list. Custom, on the other hand, simulates the user-agent strings using the user-defined JSON object. When not in use, the app doesn't consume resources and remains idle until the user needs it again. That's an advantage because the extension won't use any bandwidth. Also, User-Agent Switcher and Manager is lightweight, bug-free, and safe to install and use.