Hi,

Unfortunately there's no replacement for Quick Locale Switcher.

What you could try is this :

https://support.mozilla.org/en-US/locales

I don't think that this add-on will come even close to what you want, but I'm giving you this link, just in case :

https://addons.mozilla.org/en-US/firefox/addon/instant-translate/

Ok, thanks.

Now writing a program that modifies prefs.js and start FF, seems the only sulution. ;-(

ruud.uphoff said

Now writing a program that modifies prefs.js and start FF, seems the only sulution. ;-(

No need for that sad face just yet - who knows : somebody else just might come up with the perfect solution for you ......

I'm just sorry that hasn't been me  :-(

Note that Firefox 9 will no longer use general.useragent.locale to set the locale.

• Bug 1325870 - [meta] Unify locale selection across components and languages

There is a command line switch (-UILocale xx-xx) to start Firefox with a specific locale.

• https://developer.mozilla.org/Command_Line_Options

You can possibly create desktop shortcuts for each language or use -no-remote with separate profiles to run multiple language version simultaneously.

• http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile
• https://developer.mozilla.org/Mozilla/Multiple_Firefox_Profiles