Firefox add-on with keyword - agent

Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.

Easily override the browser's User-Agent string

Quickly and easily switch between popular user-agent strings.

Automatically change the user agent after a specified period of time to a randomly selected one, thus hiding your real user agent

Super Agent automatically fills out website's cookie consent forms for you based on your preferences. Super Agent will save you a lot of clicks and let you take control of your privacy in a very easy way.

Change your user agent easily. Allows custom user agent based on domain

agent theme

Automatically change the user agent after specified period of time to a randomly selected one, thus hiding your real user agent

Anonymize your browsing by easily switch/spoof/fake User-Agent with what you want. User-Agent selection mode: Manual, Auto, Random

Ever wish that Firefox didn't use color management when viewing images or video? Turn it off easily with this add-on.

Agentium is an extension for controlling the user agent identity reported by your browser, allowing you for instance to view the mobile version of a website on your computer.

Add a custom useragent string for desired URLs or domains.

Change your user agent QUICKLY and EASILY! Our extension includes SEVERAL ADVANCED methods of user-agent spoofing! To test its efficiency: https://webbrowsertools.com/useragent/

Adds a button to the toolbar to switch the User-Agent header.

Enables uberAgent to collect web app usage and performance data (e.g., foreground tab, page load duration) from Firefox.Enables uberAgent to collect web app usage and performance data (e.g., foreground tab, page load duration) from Firefox.

Change your user agent quickly and easily

The Proxy & User-Agent Switcher extension helps to do geolocation-testing and mobile device-testing of any websites.

Allows your browser to access AWS resources that require Amazon's Sigv4 scheme.

Enables uberAgent to collect web app usage and performance data (e.g., foreground tab, page load duration) from Firefox.

edit user-agent string quickly and easily

Spoofs the browser's user agent during u2f authentication, to allow it to be used on sites that disable security key u2f, based on user agent.

Random User Agent

This extension extends the game at http://np.ironhelmet.com/ with useful hotkeys, reports, and a heads-up display of key game data to make decision making more correct and efficient.

Gives the ability to set custom user agent string

Enhance NP Triton UI with intel.