How do I find my Firefox user agent?

View your user agent You can open the Properties of the Firefox desktop shortcut from the right-click context menu. Check the “Compatibility” tab and make sure that the compatibility mode option is not selected.

What is User Agent Firefox?

A user agent is a computer program representing a person, for example, a browser in a Web context. A typical user agent string looks like this: “Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0” . …

How do I simulate a mobile device in Firefox?

select Headers tab-> select Action ‘ADD’
to simulate e.g. iPhone add a header with name User-Agent and value: Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543 Safari/419.3.
click ‘Add’ button.

How do I spoof a user agent in Firefox?

How to change your user agent in Firefox

Open a new tab.
Browse to “about:config”
Dismiss the warning.
Create a new preference item.
Close the Preferences window.
Resetting your user agent in Firefox.

Why does Mozilla User-Agent start?

It spoofs Netscape by starting its User-Agent with Mozilla/ because web servers were routinely browser sniffing and serving pages with frames – a feature supported by both Netscape and IE, but not other browsers of the era – to Netscape only.

How do I find my browser User-Agent?

The user-agent string of the browser is accessed using the navigator. userAgent property and then stored in a variable. The presence of the strings of a browser in this user-agent string is detected one by one. Detecting the Chrome browser: The user-agent of the Chrome browser is “Chrome”.

Why do user-agents start with Mozilla?

How do I change my browser to mobile mode?

Using Device Simulation in Chrome DevTools for Mobile View

Open DevTools by pressing F12.
Click on the “Device Toggle Toolbar” available. (
Choose a device you want to simulate from the list of iOS and Android devices.
Once the desired device is chosen, it displays the mobile view of the website.

How do I check my screen resolution in Firefox?

Right-click anywhere on a page and the “Resize Window” option shows up at the bottom of the menu. Just like the other add-ons covered here, you can also set custom sizes. So there you have it, three Firefox add-ons that make it ieasy to test website in different resolutions.

How do I permanently change my user agent?

How to Change Your User-Agent on Chrome & Edge

Right Click Anywhere in Webpage > Inspect. Alternatively, you can use CTR+Shift+I on Windows, Cmd + Opt +J on Mac.
Choose More Tools > Network Conditions.
Uncheck Select Automatically Checkbox.
Choose One Among the Built-In User-Agents List.

Can I change my user agent?

If you ever wanted to make your web traffic seem like it was coming from a different browser–say, to trick a site that claims it’s incompatible with yours–you can. All popular browsers offer built-in user agent switchers, so you can change your user agent without installing any extensions.

How does user agent detection work in Firefox?

Firefox OS and Firefox on Android have very simple documented User-Agent strings. The most current case of user agent detection is to know if the device is a mobile to redirect the browser to a dedicated Web site tailored with mobile content.

How to view the user agent header in Firefox?

Use the built-in Network Analyzer (Ctrl-Shift-Q) to view the User-Agent header. Enter navigator.userAgent into the Scripting Console (Ctrl-Shift-K) to view the client-side User-Agent value. Why doesn’t the extension work on this very site (Mozilla/Firefox Add-ons)?

Which is the correct string for Firefox user agent?

In recent browsers, geckoversion is the same as firefoxversion. Gecko/geckotrail indicates that the browser is based on Gecko. On Desktop, geckotrail is the fixed string “20100101”. Firefox/firefoxversion indicates the browser is Firefox, and provides the version (such as “17.0”).

Why is http not good for user agent detection?

Basically, the HTTP specification discouraged since its inception the detection of the User-Agent string for tailoring the user experience. Currently, the user agent strings have become overly long. They are abused in every possible way. They include detailed information.

How do I find my Firefox user agent? View your user agent You can open the Properties of the Firefox desktop shortcut from the right-click context menu. Check the “Compatibility” tab and make sure that the compatibility mode option is not selected. What is User Agent Firefox? A user agent is a computer program representing…