TRANSLATION ONLY ------------------------------------ In contact with In the section "Connected sites and applications" there is "Vkontakte button in Yandex.Elements". After removing this item from the "Connected Sites and Applications" section and updating the page, it reappears. I turned to Vkontakte for support and they told me to turn to you. ---------------------------------------------------------------------------------- Please find this page : https://addons.mozilla.org/en-US/firefox/addon/%D0%BA%D0%BD%D0%BE%D0%BF%D0%BA%D0%B0-%D0%B4%D0%BB%D1%8F-%D0%B2%D0%BA%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5/ (STRANGE but works) Mozilla only ok's Extensions submitted by Developers to be used with Firefox. They ok them only and give the Developer a web page to distribute their Extension from. Developer has a Support link and a contact Link. fyi : you can post here in your own language : https://mozilla-russia.org Please let us know if this solved your issue or if need further assistance.