Meh Rated 3 out of 5 stars

Odd interface, very out-of-date UAs, not convinced it's even working. Didn't crash FF though. I'm deleting it and trying something else.

more user agents please... Rated 2 out of 5 stars

Ok, but a few more user agents should be available by default (at least android, opera, chrome, IE, safari etc). With only iphone and IE, it's too limited, and I don't want to set up the user agent strings by hand (I couldn't download the list of user agents to import).

Works but has a few bugs Rated 3 out of 5 stars

When it's working it works well but there are some bugs with it. Your user agent will get reset to default after every restart unless you add an entry to about:config. Create a new boolean entry 'useragentswitcher.reset.onclose' and set it to false. That will fix the reset problem.

Then there's the issue of Agent Switcher not working at all sometimes. For some reason Agent Switcher won't work on my main profile for FF 11. It installs but the user agent list is blank and nothing happens when I import a list and creating a new user agent doesn't work either. I had to create a new profile for it to work. On FF Nightly (FF 13) I never had any problems. Strange.

The UA list that comes with the addon is pretty weak. I don't know why the developer doesn't include a full updated list. It wouldn't be hard to do. I went to to download a fairly recent updated list. So this addon can work but be prepared to tweak it if necessary.

Fine Coding Rated 5 out of 5 stars

Five stars although I don't really understand the benefits of switching user agents aside from a privacy perspective.
BUT- it does work- and very smoothly at that. Hence 5 stars.

Rated 4 out of 5 stars

Now there is an addon which works per domain based, if User Agent Switcher could use a code like that to work the same way is would be perfect.

Rated 5 out of 5 stars

One of the most important add-ons for me, a great tool against sites that do incorrect user-agent spoofing.

便利 Rated 4 out of 5 stars



Good, but... Rated 4 out of 5 stars

please make the setting persist over browser restarts.

I would also suggest to slightly rename the Menu entry, something like "User Agent: $agent" (or "UA: $agent"). I think this is a bit less confusing.

Two simple minor changes which will make this addon perfect for me! :-)

Nice Rated 5 out of 5 stars

I use it since FF 3.X, and i'm already at FF9, without any problems.

Epic when you work with Mobile Web. Of course it does not emulate the html rendered by the devices but the main use is to test the behavior of some application in lots of user-agents.


Rated 5 out of 5 stars

Somehow I installed this on Firefox v9.0.1 and it works perfectly fine, helping me to download HDMOV movie trailers from Doesn't slow the browser down, the button looks fine with my theme. Handy addon.

It makes browser UGLY slow! Rated 2 out of 5 stars

This plugin makes browser UGLY slow!
Just try to open new window (Ctrl+N). The browser and system hungs up for a few seconds during this operation.

Tested on browser: FF 3.6

Rated 5 out of 5 stars

This is a great extension and very useful. However, it does not work with SeaMonkey 2.6. I delayed updating SeaMonkey when it told me that this extension would be disabled if I updated from 2.5 to 2.6.

Great Add-on Rated 4 out of 5 stars

Many thanks for this add-on, it's an invaluable tool for accessing websites that falsely declare "your browser is incompatible/outdated." Only concern is the toolbar icon - it increases the size of the add-on bar when placed in it, and when in the navigation bar it does not have the same button style as the other icons.

Rated 5 out of 5 stars

I translate header this page

I am Russian, and bad know English, correct my mistakes.

Original English text:

About this Add-on:
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

My additions in English:

About this Add-on:
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser. Allows you to mask your browser and operating system. You can export / import of settings in the XML.
For example, to view the video without adobe flash plugin (with HTML5), choose User-Agent - Iphone.
User Agent to Firefox is restarted not reset to default, and is stored, you must:
about: config
create new string value:
useragentswitcher.reset.onclose true

My Russian translation:

Об этом дополнении:
User Agent Switcher это дополнение, которое добавляет меню и кнопки на панели инструментов браузера для переключения строки user-agent при обращении браузера к сайтам. Позволяет маскировать свой браузер и операционную систему. Возможен экспорт / импорт настоек в xml.
Например, для просмотра видео без adobe flash (HTML5) следует выбрать User-Agent - Iphone.
Чтобы User Agent при перезапуске Firefox не сбрасывался на default, а запоминался, необходимо:
create new string value:
useragentswitcher.reset.onclose true

Great but have to download more agents Rated 5 out of 5 stars

Check out what sites are redirecting mobile users with the iPhone user agent. Need to find more user agents to import though.

Rated 5 out of 5 stars

Great extension, but it should come with a more complete list of user-agents built in (along with all the other variables) so that by default there is a longer list of web browsers and bots and mobile devices you can have Firefox impersonate, and also having different versions of each browser (including Firefox). Everything else about this extension is perfect, the only flaw is the rather short default list of user-agents. And it works perfectly in Firefox 8.0.

Rated 3 out of 5 stars

This plugin needs a feature where it starts with Firefox using the last used useragent. I hate how I constantly needs to switch it.

Good, but limited options. Rated 3 out of 5 stars

This addon changes the user agent globally (for every site). If you want to just change the user agent on a site-by-site basis, install the UA Control addon:

Rated 4 out of 5 stars

Sehr nützlich und funktioniert zuverlässig.

Rated 4 out of 5 stars

If u add some more environment it will be more strong & useful ****