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How can the user agent be changed in Opera?

The per-site preferences (tab Network, field Browser identification) lists

  • Identify as Opera
  • Identify as Firefox
  • Identify as Internet Explorer
  • Masquerade as Firefox
  • Masquerade as Internet Explorer

But can it be set to an arbitrary string (for example, googleinstantisreallyirritating)?

Opera version: 11.11

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2 Answers

up vote 3 down vote accepted

Since Opera 12 there is a new option for an arbitrary string: Open opera:config#UserPrefs|CustomUser-Agent in the address bar, enter the desired string and click on Save at the bottom of the page. The change will apply without restart.

Or you could use the extension https://addons.opera.com/en/extensions/details/user-agent-changer/ which makes it a little bit easier.

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Opera support document indicates this is not possible. The possible choices are the numeric identifiers, which correspond to each user agent mentioned in the question.

This comment (admittedly, over a year old) by an Opera employee also confirms the same.

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