Topic: User-Agent Switcher is a browser Addon to change your browsers UA

[Software Santa]

User-Agent Switcher is a multi-browser Addon that helps you quickly change your browsers User-Agent (UA). For Firefox, Chrome, Opera, or SeaMonkey browsers .... https://mybrowseraddon.com/useragent-switcher.html

There is an Updated Version for Firefox 57+ written with web-extensions API HERE:  https://mybrowseraddon.com/custom-useragent-string.html

About this extensionNote: 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 after reload.
b. The first row in the panel UI is for mobile user-agents.
c. Second row is for desktop user-agents and third row is for desktop operating systems.
d. The last row in the panel UI is dedicated for the control options including a button to change the UA to its default value. A button to edit the current UA, you can also use it to copy the current UA to the clipboard. Moreover, you can specify a particular URL or domain so that UA is only applied to that URL or domain (read FAQ for detailed description)
e. There is also a status-bar in the panel to show the current UA and other info as you move the mouse within the popup UI.
f. Default UAs can be modified from the toolbar panel UI (v.0.1.4)

Some useful user-agents are as following:
1. iOS: an Apple OS for iPhone/iPad devices.
2. Android: a Google OS for various mobile devices including Nexus.
3. Windows Phone: a mobile OS from Microsoft for windows-phone devices.
4. Tizen: a new mobile OS form Samsung.
5. Symbian: an old mobile OS designed by Nokia.
6. Chrome: a browser build by Google.
7. Opera: a browser build by Opera Software ASA.
8. Firefox: a browser build by Mozilla.
9. Safari: a browser build by Apple.
10. Internet Explorer, Edge: two browsers build by Microsoft.
 Note 1: in order to report Bugs, please visit Addon's Homepage and fill the bug report form.
 Note 2: in order to use custom user-agent strings, please use my other addon, Custom UserAgent String.

https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher-revived/?src=search