Por favor, dê uma olhada em TabLang .
Allows you to keep separate keyboard layout for each tab and automatically changes system input locale when switching between tabs or windows - the feature Firefox lacks in comparison with Internet Explorer.
Features:
- Changing keyboard layout when switching between tabs/windows (including sidebars)
- Configurable default keyboard layout for new tabs/windows
- Opening link in new tab/window preserves keyboard layout
- Preserving independent keyboard layout for address bar globally or on pre-tab basis
- Preserving independent keyboard layout for web search bar and page find bar
- Session restore support
- Undo close tab, tab drag-n-drop and tear-off support
- Panorama (tab grouping) support