Hello.Tell me please when you see the Russian in the Ice Dragon Comodo?
I have also created a Russian XPI file that is working fine 8)
1.Download the file and unrar it.
2.Install ist
3.After you have installed it, you must change the following settings:
type in the adress bar
about: config
than search for:
general.useragent.locale
and change:
en-US to ru-RU
4.Restart IceDragon and have fun 
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Thank you!
It worked. All o.k. But only additional setting-all empty.Clear window.
Why window clean?