User-Agent Switcher (Add-on SDK) – Get this Extension for 🦊 Firefox (ja)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
