Okay so, I did a bit of research and found some possible solutions that might solve your issue. When you access a website, your browsers sends a so-called "Accept-Language" Header. That header contains your preferred language and region codes together with priority values. On Firefox Android, while it's impossible to change these preferences inside the app's settings, Firefox uses your system preferences. You could try the following: 1. You can change your preferred region inside the system settings (something like Settings > System > Language and region, might differ according to device). If you set "English" as language, but "Sweden" as your region, websites can know that you're not US- or UK-based. It's up to websites to recognize this though, some might just go by the English tag. You can also add a second language in the system settings, which will also be sent inside the header, but with a lower priority. Websites might use this to determine that you are Swedish and don't necessarily want to switch, but again, this is up to website configuration. 2. You can use an Extension (I found [https://addons.mozilla.org/en-US/firefox/addon/accept-language-per-site/ this on the Mozilla Add-on Store] which works on Android) to change the language header that is transmitted. You can configure it to do this on all sites by setting "Host" to "*" and "Language" to, for example, "sv-SE" for sweden. You can also set priorities, for example you can set "en-SE;q=1, sv-SE;q=0.8" as your Language header. This would translate into your preferred language being English for Sweden, followed by Swedish for Sweden. [https://gist.github.com/JamieMason/3748498 Click here] (GitHub) for an overview of language codes, and you can find out what your browser is sending as the Accept-Language header [https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending/ on this site]. I hope this helps!