How To Emulate A Mobile Web Browser In Firefox?

There are several times when you may want to test out a mobile website, or use mobile websites to save bandwidth, since they load pretty fast and do not use heavy images, which in turn can use up more bandwidth from your ISP.


However many mobile websites redirect users back to a regular website, when you visit it using browsers such as , , or Internet Explorer.

Also Read: Monitor Your Bandwidth Usage

If you are looking to test a website or save some bandwidth while surfing your favorite social networking site, a simple could help you emulate a mobile web browser and let you surf the website, like you would do in a actual mobile web browser.

The trick involves changing the user agent string, that is sent out to website, to make them think, that the request is coming from a actual mobile web browser, you can practically emulate default system browsers from any phone.

Steps To Emulate A Mobile Web Browser In Firefox

Step 1: Download the User Agent Switcher Add-on for Firefox

Step 2: Restart Firefox for the add-on change to take place.

Step 3: To emulate a mobile web browser, you will need to change the user agent string that is sent out, we recommend finding a appropriate user agent string from this huge list of mobile browser strings.

Step 4: Once you have identified your favorite mobile browser string, go to Tools > User Agent Switcher > Options > Options in Firefox.


Step 5: In the options window for user agent switcher, select User Agents and click on the add button.


Step 6: In the new Add User Agent dialog box, give a appropriate name to the user agent and copy the user agent string you got from step 3 into the second text box, for example we are creating a user agent string for iPhone, so we named it as iPhone emulator and added the default user agent for iPhone in the User Agent text box.


You can leave the other options provided as blank, once you have entered the details, click on the Ok button.

Step 7: To start a new browsing session using a emulated web browser, go to Tools > User Agent Switcher and select the appropriate mobile web browser you want to emulate, to switch back to normal browsing, just select the default option from the same menu.


This tip will allow you to browse mobile web sites or test them out from your PC, however this trick cannot be used to test out mobile applications, that require you to install something to the mobile phone, however you can still use this trick and save on bandwidth too.

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19 thoughts on “How To Emulate A Mobile Web Browser In Firefox?”

  1. Great tip, I’m looking into tethering in case of hurricanes, but was worried about how much bandwidth a traditional pc/laptop browser would use.

    Not that I’d be surfing youtube after a hurricane LOL, but what mobile user agent do you recommend so that youtube works? I’ve tried iPhone and Android, and have received different error messages for each. But what’s both amusing and frustrating is that embedded youtube movies work great.

    PS: Your email requirement won’t recognize emails with dots before the @ sign, uhhhh ok, throwaway hotmail for your script LOL!

  2. I’ve got the add-on but it tells me that in order to view youtube videos I need to enable the flash add-on for safari, which I obviously cannot. Any ideas?

  3. Anyway perhaps to enable Youtube with this?

    I’m not developing websites, but when I’m capped I prefer to use less content by default and the user-agent emulating Archos seems to work nicely, however not for flash content. Using the Iphone user-agent I get told I need to enable the flash add-on for safari, which I cannot, obviously.

    Any ideas?

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