Updated tab appearance and behavior
- Outdated tabs are now hidden when restore tabs setting is set to "Always restore"
- Remember scroll position and zoom level for open tabs
- Updated media controls to avoid playing sounds from multiple tabs at once
- Visual improvements in favicon display
Added tour of indispensable features like Reader View and Sync to First Run page
Locales added: Spanish from Chile (es-CL) and Norwegian (Nynorsk) (nn-NO)
Default search engine changed to Yahoo for Chinese (Traditional) locale.