<![CDATA[User-Agent-Switching Extensions do not work in Opera?]]>I created an WebExtension to force Facebook into the old layout - OldLayout.com

It's very simple, but it doesn't seem to work in Opera. So I tested other extensions that change the user-agent header in requests, and none of them seem to work either! I'm using https://manytools.org/http-html-text/http-request-headers/ to look at the actual request headers being sent, and the user-agent header is never being modified, by any extension.

My code is extremely simple, and uses chrome.webRequest.onBeforeSendHeaders.addListener() to intercept headers and change user-agent. Full source is here: https://github.com/matt-kruse/old-layout/tree/master/extension

I can't find any documentation that says webRequest is broken in Opera. But, I am also not a regular Opera user so I don't know if I'm missing a setting or something that is required for these to run? Any tips at all?

]]>https://forums.opera.com/topic/43130/user-agent-switching-extensions-do-not-work-in-operaRSS for NodeSat, 18 Jul 2026 16:02:23 GMTSat, 29 Aug 2020 20:15:04 GMT60<![CDATA[Reply to User-Agent-Switching Extensions do not work in Opera? on Sat, 12 Sep 2020 15:17:49 GMT]]>Have you found a solutions to this yet, most of the things I use like streaming services will not work with the new facebook. Thanks

]]>https://forums.opera.com/post/224456https://forums.opera.com/post/224456Sat, 12 Sep 2020 15:17:49 GMT<![CDATA[Reply to User-Agent-Switching Extensions do not work in Opera? on Tue, 01 Sep 2020 05:51:32 GMT]]>@leocg According to another tester, changing user-agent header in an extension is broken in Opera back to earlier in 2020. I have tested several other user-agent switcher extensions in Opera, and none of them work. It definitely seems to be a bug in Opera.

]]>https://forums.opera.com/post/223255https://forums.opera.com/post/223255Tue, 01 Sep 2020 05:51:32 GMT<![CDATA[Reply to User-Agent-Switching Extensions do not work in Opera? on Sun, 30 Aug 2020 01:00:57 GMT]]>@mattkruse I've checked here with one extension and it didn't work. Maybe something has changed that broke those extensions.

Would be interesting to see if they work in other Chromium based browsers.

]]>https://forums.opera.com/post/223024https://forums.opera.com/post/223024Sun, 30 Aug 2020 01:00:57 GMT<![CDATA[Reply to User-Agent-Switching Extensions do not work in Opera? on Sat, 29 Aug 2020 22:43:55 GMT]]>@leocg Is there anything special needed to enable them? I believe I've done everything needed, yet headers still don't seem to get modified.

I'm using the very latest Opera, not sure if that makes a difference.

]]>https://forums.opera.com/post/223017https://forums.opera.com/post/223017Sat, 29 Aug 2020 22:43:55 GMT<![CDATA[Reply to User-Agent-Switching Extensions do not work in Opera? on Sat, 29 Aug 2020 21:08:29 GMT]]>@mattkruse I have used a few of those user agent switches extensions and they seemed to have worked. At least the user agent looked different in some testing sites.

]]>https://forums.opera.com/post/222997https://forums.opera.com/post/222997Sat, 29 Aug 2020 21:08:29 GMT