?) How to upgrade Mozilla Firefox.
Step 2: Enter system pass word and authenticate
Step 3: Click reload buttion
Step 4: After finishing dowload close download window
Step 5: Search firefox in search box
Step 6:Roght click on firefox line, select mark for upgrade and then aply in two places. After completing download close all the windows and restart Firefox
?) How to add languages in Ubuntu and show in panel.
Step 1:Open system settings (Applicationns->system tools->system settings) and click on text entry settings
Step 2:Click '+' sign.
Step 3:Then select the language and click 'Add'
Step 4:Put tick mark to show icon in panel
Step 5:Change language from panel
Step 6: Use short cut Super+Space