Note: if you have Firefox 57+, please consider installing the web-extension version of this addon. User-Agent Switcher can quickly and easily changes your browser's user-agent. There are 26 popular user-agent strings to choose from! Important features are as following: a. Toolbar popup UI provides an easy interface to access 26 user-agents. Clicking on any UA, will change your browser's user-agent
![User-Agent Switcher (Add-on SDK) – Get this Extension for 🦊 Firefox (ja)](https://cdn-ak-scissors.b.st-hatena.com/image/square/49e4e82e68299afb122d78d674ebeccc2450b68b/height=288;version=1;width=512/https%3A%2F%2Faddons.cdn.mozilla.net%2Fuser-media%2Fpreviews%2Ffull%2F169%2F169033.png%3Fmodified%3D1530209187)