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Why all addons installed or updated go with language different from my Firefox language?

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I have Firefox 31.4.0 ESR English on Russian Win 8.1 I always use English Firefox with English-language addons. In my Options English set as a primary language. I have general.useragent.locale set as en-US.

But some time ago many addons in my installation started to use with Russian language. It's absolutely inexplicably and I can't find a solution. I want to have the same language in addons that I have in browser. Please help me.

Thank you!

I have Firefox 31.4.0 ESR English on Russian Win 8.1 I always use English Firefox with English-language addons. In my Options English set as a primary language. I have general.useragent.locale set as en-US. But some time ago many addons in my installation started to use with Russian language. It's absolutely inexplicably and I can't find a solution. I want to have the same language in addons that I have in browser. Please help me. Thank you!

All Replies (4)

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Could anybody help with my problem?

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Does this happen when you install the add on or after?

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Some extension may check the value of the system locale.

You can open the Browser Console (Firefox/Tools > Web Developer). Paste the JavaScript code in the command line and press the Enter key to run the code.

  • Toggle the devtools.chrome.enabled pref on the about:config page to true to enable the command line
var localeService = Components.classes["@mozilla.org/intl/nslocaleservice;1"]
                              .getService(Components.interfaces.nsILocaleService);
var systemLocale = localeService.getSystemLocale().getCategory("NSILOCALE_CTYPE");
console.log(systemLocale);
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cor-el said

Some extension may check the value of the system locale.

Thank you, can I change these extensions behavior?