Firefox Change Browser User Agent Presented to Server

Research Links

• How to change your user agent in Firefox
• about:config – for firefox settings
• List of User Agents
• WhatIsMyBrowser.com – shows the browser agent presented.

Slack Related

• System requirements for using Slack

User-Agent Switcher and Manager – Browser Extension Review 

• User-Agent Switcher and Manager by Ray
• User Agent Switcher and Manager Spoofs and mimics browser's User-Agent strings